have used on a couple quads and had no major issues, once I figured out how to wire it correctly. Yes the GPS lock takes longer than I would like at times, but it wasn't noticably better or worse with two other gps models.

I PUT THEM ON A 4 INCH AND IT WORKS AMAZING WITH 6SBATTERIES

It could be just my luck, but it seems like they either work or then don't. I have used a few of them and various builds and sometimes they just do not work. Meaning, I would finish a new build, and when I test the GPS, I would not get any signal for a LONG time. Then I would switch the GPS out for another one (on the same quad) and it would work perfectly. I kind of gave up on these budget GPS and went with some more expensive Matek M8Q-5883.

works great and gets RX and gets fast GPS

Only reason this is 3 stars is that maybe every 1/10 flights the home position moves around like crazy with more than 7 sats. Also this GPS takes a minute or two to get a descent fix every arm