CSL - Vertical Ergonomic USB Mouse - Wired Optical Mouse TM137U - Mice with Ergonomic design - 5 Buttons - 1600dpi - prevention against mouse arm tennis elbow - For Laptop Desktop PC Computer Macbook

CSL - TM137U optical mouse / vertical model | ergonomic design - prevention against mouse arm/tennis arm (RSI syndrome) - particularly arm-friendly | wireless | 5 buttonsThis is an excellent Vertical Mouse. I was going to get another Anker Wireless Vertical Mouse (also excellent) - but then I thought "How do I tell them apart on the desk." I then came across what looked like the 'same mouse' - only from CSL. And it was cheaper - definitely worth the risk.The CSL is almost identical to the Anker - or perhaps the Anker is almost identical to the CSL? Differences are 1. no branding name on the surface of the CSL 2. The wheel hub of the the CSL is shiny black while the Anker wheel is shiny chrome 3. The palm surface area of the CSL is a nice flat matt black with a great feel while, also with a great feel, the Anker is a sort of Pearl black finish. Holding the two side by side you can see the different "shades of black" - both look good. 4. The CSL came in an excellent "white box" - the Anker in a retail package - both great for their purpose ... but as a consumer I'd rather have the money saved by not having a 'retail attractive box' to throw away, than pay extra for it. 5. The CSL came with 2 AAA batteries to get you started.The 'mouse' tilt / angle will help with people having wrist / lower arm problems when using a 'normal mouse'. I noticed an almost immediate 'relieving' of the problems I was having (see Anker review). The only change I'd make to either of them would be to 'steepen' the palm face angle a bit more - but that may not suit everyone. If you are at all 'iffy' about trying a vertical mouse this is the model to try - you will find it quite easy, and quick, to re-learn your grip. At this price (including postage) you'd be silly not to give it a try - and it's wireless so no cluttering cables, and the wireless receiver is a tiny usb stub that requires no setting up - I use mine in Windows 7 and Linux Mint, laptop and desktop, without problems - it just worked.The only downside to both these vertical mice is the thumb operated web page forward / backward buttons are not right for my thumb. I never use them so I don't have a problem with this. The wheel works well, right & left mouse clicks are good, the body is easy and light to hold and move - together with the improved wrist angle that's enough for me. I don't know why it took so long for me to try this type of mouse, I should have tried them years ago - perhaps it was the high cost of the earlier ones that put me off - too much to 'risk'.How long the batteries will last I don't know - but a good feature of both CSL & Anker is that they have an 'auto-off' after a certain time of non-use; a real battery saver. A single clicks powers it up again (earlier wireless mice I've had I was always leaving 'on' - not good).All in all an excellent, and very sensible, vertical mouse at an excellent price.

Good alternative mouse which works surprisingly well.I bought it as it was best value from the various options. It also has replaceable batteries - which keeps the replacements under your control and not relying on a 'locked-in' battery.Good weight and shape which feels better than it's price. You can almost forget that it is a cheap copy.Other reviews negative issues were not a problem for me. The 'ratcheted' wheel works fine as the movements are small. The click to reactivate (rather than move) is also OK. If you want these functions you can pay a lot more. Also there is no distracting light in normal operation.A nice feature is that the transmitter slides within the body of the mouse so keeping them together.I have used it on a few machines with no problem.One issue I did note is that if you go back and forth from the mouse and keyboard that the top 'fin' can get in the way. Just needs some adaptation of movement by the user.My wrist feels much better so top marks for the very reasonable price.-------------------------------------------------------------------------------------------------------After 6 weeks of use it's settled into regular use. It has survived a few drops and is working well.I do miss the 'feel' of a quality mouse - but the £60 saving more than compensates...

This mouse was so good I bought it twice, after the first one went to my second PC.Pros:Very functional in terms of what it's meant to do. Easy to use.Very comfortable, both ergonomically, and the texture of the mouseSensitive mouse that responds well.Good enough cable length for more situationsVery good value for money.Clicks are satisfying and accurate.Looks greatConsThe material of the mouse can get sticky if you're not careful and use it with oily hands. So, keep your hands clean and the mouse will feel great. Otherwise it can get sticky and doesn't actually clean very well. This is because of the material.Might have been nice if the side light was LED and could be changed, but sadly it's just blue and cannot be turned off.