With the large screen of the Evo, I finally ditched my Garmin, and I'm using my phone as a GPS. This mount is perfect for the phone. You can adjust the bottom supports so they don't get in the way of the charge port. Also, the side arms hold the phone securely without getting in the way of the volume rocker.
The build quality of this mount is very impressive for the price! The plastic feels solid, not flimsy, and the suction cup is stronger and larger than the one that came with my Garmin. I was concerned about this, as I didn't want to risk my new phone in something that wouldn't hold it right. But after trying it out, I'm very pleased with how snugly the mount grips the phone. It's not going anywhere.
I like this mount so much that I came back to order one for my other car (only to find that they're now back-ordered).
One thing -- the vent mount doesn't hold very tight on my car, so that I don't feel comfortable using it. Maybe it's my particular type of vent (it's an old, old car), or maybe I'm not installing it right. However, the windshield mount is excellent.
I would definitely recommend this to a friend.