ELECOM DEFT PRO Trackball Mouse, Wired, Wireless, Bluetooth 3 Types Connection, Ergonomic Design, 8-Button Function, Red Ball, Windows11, MacOS (M-DPT1MRXBK)

I got this to use in my primary work station and use it 8 hours a day or more 5+ days a week. The large ball is smooth and makes pointer placement more precise, Bluetooth easy to use, alternative RF transceiver also easy to use, signal of both wireless connections is strong, device is solid quality, stays put but not too heavy when go mobile, software decent, buttons easy to use once used to them, customizable but I haven't done much with that feature set. It took a while to get used to using my fingers to move the ball after using a thumb-driven trackball for a long time, but it's a good switch to keep RSI at bay. Overall, good value.

I am leaving a review of the Elecom Huge and Deft Pro after over a week of intensive "testing" of several trackball mice. Let me begin by stating that I am new to the trackball world so these are my observations from that point of view and I'm leaving these reviews in hopes that it will help someone else who might find themself in a similar situation to what I was in a week ago with no experience with trackballs in a world of opinions.I have mid-sized hands with somewhat thicker "carpenter" fingers and I bought this item to replace a mouse for general and light CAD use. I have a CAD mouse for more intricate work but over the years of design and IT work I'm beginning to develop wrist discomfort. This was the first finger trackball that I tried after testing a Logi M575 that a friend brought over to try for Fusion work. I was hooked on the ball, but I wanted a little more control so I went with the finger style. I found the thumb style to fatigue my thumb joint a little too much.Right out of the box I was impressed by how relaxed my wrist felt on the Huge. I liked the size of the ball and the smoothness of the scroll wheel. It seemed very intuitive to someone new to the trackball realm. The two things I couldn't get over were the stretch of the side buttons with my somewhat shorter fingers and of course, what many of the other reviews talk about, the "stiction" of the ball itself. I did like to overall ergonomics, but decided to defer to the Deft Pro for my next try.I found the Deft Pro to be a better fit for my shorter fingers and the ball a little easier to control for more intricate commands in Fusion while cradling it between my first and middle finger and occasionally passing it off to my right ring finger. I also liked the way that my hand relaxed in a "cradle" position over the Deft Pro while allowing me to rest my wrist lightly on the table. The Huge allowed a straighter relaxed wrist on the device overall, but the Deft Pro felt like it was easier to control for smaller movements. Again though, the bearings on the Deft Pro were too sticky for me and I ordered the bearings to replace them as many have suggested, but decided to return both units before I modified them after finally settling on a combination of a much smoother out-of-the box Slimblade pro for general use and a 3dconnexion CAD and Space mouse combo for design work. The CAD mouse has a really nice form factor for a mouse and I was immediately able to find a comfortable relaxed position on the ambidextrous Slimblade Pro. I didn't have to 'hover' on the Slimblade as many reviews have noted. I realize that this type of setup isn't easy to obtain for a lot of people so I'll leave with this final word based on my spending a week with all three trackballs. Both the Deft Pro and the Huge are great trackballs and a lot of people like them once they are modified to fix the sticky ball issues. As a CAD guy I didn't like the click of the Deft Pro scroll wheel and I though that it felt cheap compared to other scroll wheel mice I've used, but I could have gotten used to that because of the Deft Pro's overall precise control factor if it weren't for the "stiction". Elecom makes track balls feel intuitive, even for new believers like myself, I just couldn't get past the quality issues with the bearings right out of the box. I was either going to spend less for a mouse than the price of Elecoms and deal with the issues they might have caused or spend more and get the performance that I was looking for without having to modify a unit right from the start.These are just my opinions, but I hope this helps someone else who may have been reading reviews for hours, and testing units like I was just to find a suitable replacement.

Smooth trackball. I didn’t encounter any issues. Many functionalities can be assigned to the buttons. I cannot comment on the design as I am a newbie to trackball mouse so I believe I will soon have the muscle memory to get accustomed to it. For now, my thumb often inadvertently depress the main left click button whenever I roll the trackball sideways.

Great comfort. The driver program did not come in English, but it was easy to change. I love that three of the buttons are also programmable and I have them set for cut/copy/paste. I suggest the HUGE for wrist comfort as I had to purchase an additional mat with the DEFT PRO. About 2 years now and I have zero issues with movement. This works well with Bluetooth and the cable to plug in. Very worth it. The battery has a great life, even on the max DPI settings. So glad I got it.

I have never had problems with previous Elecom devices, however this device has serious issues.1. Requires full reinstallation with EVERY reboot of the PC. Upon a fresh boot, an error pops up stating that there is a hardware fault with the USB receiver. The mouse will not respond or connect until you unplug the receiver, uninstall the device using a second mouse, and reinstall the receiver.2. The 2.4Ghz wireless function is very temperamental. If it has direct line of sight and NO OBSTRUCTIONS then it mostly works like expected. If there is even a minor object partially in the way, the body of the laptop computer for example, then the mouse will lag by nearly a second, jutter, and skip all over the screen. It is entirely unusable in this configuration.Both of these issues make it very unusable in its current state. I'd love to say that there is a driver or firmware issue, but there is nothing available to update from the Elecom website. The "Mouse Assistant" software is only helpful in remapping keys.Maybe I have a defective receiver? I will never know as their entire support portion of the website is a redirect to the "Mouse Assistant" software (entirely unhelpful in any troubleshooting) and a warranty form to ship the device back to Elecom. Not even an email address, so disappointing.Elecom - If you monitor these reviews, send me an email address! I would love to try a driver or firmware update to see if it addresses the problem. And if I have to swap parts, it would be nice to send the $1 receiver portion that doesn't work properly instead of the entire $60 mouse. Also, I believe I can speak for most people when I say that sending a relatively expensive piece of hardware to a building with no prior communication is a TERRIBLE customer service experience. I might as well save the shipping and handling, throw my device in the trash, and start over with a competitive product.