Mark Traverswrote a review of GoPro Helmet Front Mount on September 3, 2015
Familiarity: I've used it several times
This is a nice upgrade from the standard helmet mount (flat/curved surface mount) that comes with most GoPro packages. I used this on my ski helmet (Giro Seam) and it gives you a good bit of flexibility to get the angle, height, and front/back location of the camera just right on your helmet. This would be especially helpful if you have a helmet with a lot of vents in the front that you need to work around.
So far no complaints on the durability. This mount held up just fine over a trip to Alaska and a couple other trips last season, including a pretty nasty headfirst wreck I had in flat light conditions. My helmet (and the GoPro mount) took the brunt of the impact and everything survived.