@ theblackdragon quite frankly the legality doesn't concern me. Morally speaking I'm comfortable - I've bought these games (often multiple times like Zelda, mario bros etc) so having one extra handy copy on my phone doesn't make me a monster.
Having one device that plays all my atari, nes, snes, n64, game boy, game boy advance, master system, game gear and megadrive games which I have will me at all times is very handy. I still tend to buy things from VC though as the controls are better.