This device is extremely fulfilling to my inner child. There have been no issues playing .z64 games that I've ran into, however it will occasionally crash playing ROM Hacks, but this is an expected outcome and due mostly to the hacks themselves. I have ran into issues playing various gameboy and gameboy color games. The games seem to run fine for the first few minutes, but will crash after progressing so far in a game. Other than that, this has been an amazing product.