The screen is not bad. It is on-par with GBA's screen for visibility (not for # of colors).
Niode, where did you get all these games - when I was in the U.K. I didn't have an easy time of getting NGPC games (I got both Metal Slugs and Sonic, basically)?
BTW I have (or had - I don't remember if I sold it) a Swan Crystal and don't think it is worth it unless you know Japanese.
The "clicky" stick instead of a regular d-pad has some head-turning potential. Not as much as a Virtual Boy strapped onto your head (see Keith Apicary videos for examples
Ivo.