The AtGames "Sega Genesis console" is powered by a horrible emulator. In particular the sound emulation is complete crap. If you're gonna use an emulator, a high-accuracy PC-based emulator like Fusion (Kega Fusion) provides near-perfect emulation and has optional filters to improve the visuals on modern displays. Guess I'm a snob. Anyway you can get a real Genesis for fairly cheap.
The rubber anti-vibration fan "screws" are rubber, silicone ones tend to hold up better IMO.