I got my Everdrive GB. It works fine. The battery in my old GBA SP (AGS-001) is kind of fucked, though, so I'm gonna have to order a battery.
The game I'm playing the most on it right now is Catrap, which is kind of a side-view Sokoban. I've been trying for several hours to solve one particular puzzle. Either I'm a retard or it's just that difficult.