I absolutely love Funnyplayings Gameboy Color and Gameboy Advance shells. They make them easy to use with their IPS screens and have a good feel to them. They even include some of the “Nintendo” details other 3rd party shell makers avoid or miss.
The GBA SP is a miss though. Hinge covers were flimsy, the clamshell rubber bits were a weird, smaller size and the screws were mostly different (where in other cases they tend to use the same type of screw).
Disappointed but hopefully future releases will get better.