Cam Phillipswrote a review of Tate Labs Bar Fly MTB 3.0 Mount on March 9, 2015
Familiarity: I've put it through the wringer
I thought I had written a review on this, but I guess I hadn't...
I had been using one of these with a Garmin 500 for about a year on my MTB with no real complaints, and then I upgraded to a Garmin 510. As soon as I put the 510 in, I noticed that it didn't fit as snugly, but I thought maybe the Bar Fly was just a little worn. I bought a second MTB, and another Bar Fly for that bike, but the 510 still didn't fit as snugly as the 500 did. Not a dealbreaker, but puzzling.
Fast forward a bit.. One of my Bar Flies broke at the tabs just removing my Garmin 510 (clockwise as recommended) and then when I went to replace it with my older Bar Fly from my other bike, that one broke taking it off of the handlebars. I removed the bolt and slid the Bar Fly down to the narrowest part of the bars and opened it just wide enough to remove it, but it snapped. That Bar Fly was at least a year old, but the one that broke at the tabs was only a few months old. Overall, I am very disappointed.
I was at my LBS last week and they are now stocking the SRAM Garmin mount with positive feedback from users. Priced $5 less than the Bar Fly, and looking to be just a bit nicer in terms of design and construction, I went for one. The Garmin 510 fits snugly, although time will be the test. I attached a photo of the SRAM mount. I posted a photo of the failed Bar Flies separately on this item page.