The quality of the aluminum portion is great, fits perfectly on enve stem and fits Garmin 810 and smaller no problem. I have it mounted on an upturned stem, which points the computer up towards the sky a bit too much, so it would be nice if they offered different angles. I like the fact you can flip it and mount on upper or lower bolts to place it at various heights but even on the lowest position, it is a bit high when pointed upward. If I were to flip the stem, it would probably be ok. The plastic part that holds the computer is a bit flimsy, primarily where it is bolted on with one tiny bolt. Garmin 500 not a problem, but with a large computer like the 810, it flexes a lot when I push the buttons on the bottom. And I also started having a problem when I would turn the computer to remove it, the entire plastic insert would turn with it loosening the screw. This was due to the insert flexing enough to defeat the anti rotation notch moulded in the part. Enve promptly sent me a new plastic insert that seems to work better, but lock tite on the screw seems to have made a big difference. A two screw mounting fore and aft could solve both the flex and rotation. I can imagine the plastic around the one tiny screw failing and bye bye Garmin. Having said all that, I think it's still a neat mount I will continue to use with a leash, but will trade up if they improve the issues I see.
It's lightweight and performs well. It doesn't allow the angle to be adjusted and I feel it's a little long for a smaller bike computer such as a Garmin 520.