Got the game gear yesterday. Works almost flawlessly - Cart slot needs cleaned.
Think I'm gonna swap the case for another GG though. Hopefully its a simple swap.
There's somehow dirt behind the screen protector and there's something rattling inside the case.
Also the Majesco GG doesn't have the threads on the back so any attachments that screw on can't be used.
The screen and sound work pretty awesome compared to any other GG I own though.

So now all I'm waiting for is wiggy to get up an running, and sell me the GG light mod he's working on =P
Thought about doing the 2 LED mod real quick, but the pics wiggy showed me on CAG look a lot cleaner.
Edit: decided to Keep the Majesco case. Bit harder to swap cases than I thought. I could do it, just don't feel like it this morning.
The rattle was the speaker. The speaker mount was busted, so it and the speaker were moving around. (Fixed - hot glue)
I am going to try and take the brass nut off a tore up GG and install it in the Majesco.
Edit 2: Got the brass piece in for attachment and its all back together ^_^
(its held in by pressure, Used a drill press to press to nut in, still put a dap of glue on it.)