DIYmallsBN-880 GPS Glonass Module with Flash HMC5883 Compass 72 Channel 9600bps NMEA-0183 1Hz + GPS Active Antenna for Arduino Flight Control

So far, I've only tested this indoors, but my experience with it thus far has been great.From a cold start, it takes a while to get a fix. But it does eventually get one, and subsequent starts will see it getting a fix much more quickly. Sitting on my desk, it has consistently tracked over 7 satellites, with it often going as high as 10 or 11. Once it has a fix, I haven't seen it drop the fix while powered on.The position is also incredibly accurate, getting down to a radius of ~18 meters of my actual location- again, this is indoors, so the performance outside is likely to be even better. The speed measured by it is also quite accurate- sitting still, it usually indicates under 0.5 kph with it *occasionally* going up to 3.The included magnetometer works incredibly well and gives me a very accurate reading on 3 axes. Just gotta make sure to mount it with the antenna facing upwards.

Works well and with a high sensitivity even indoors - the built-in preamp is responsible! Wasn't able to test setting the satellites to include Galileo. Needed an extra wire soldered on (to the PPS LED) to get a PPS output I could use with the Raspberry Pi.

I have a few of these and had no problems

Good module with lots of interfaces and logged in very quickly

Works well, giving accurate location data with real time data and a compass. Does exactly what it should do. Good buy.