Feels cheap and the screen looks cheap. The d-pad is curved, which doesn't feel right. The Tetris included is specifically made for this system and while the game plays okay, there is no record kept of your high score. The 220 games are all crappy throwaway games, although there are functional versions of checkers, solitaire, reversi and Tron light cycles.
A video showing the list of the games it comes with can be found here:
• My Arcade Tetris Porta...
It's garbage and unless you want to support more garbage in the future, avoid it.