Conclusion: Overall, BenQ’s JoyBee GP2 is the classic jack-of-all-trades but master of none. If you can live with trading picture quality for portability, it may be the perfect addition to your travel bag.
Pros: Small and light; iPod/Phone dock; WXGA (1280 x 800) native resolution
Cons: Not bright enough for large meeting rooms; mediocre picture when watching movies; battery pack halves brightness
Excerpt: BenQ’s Joybee GP2 is an all-round enhancement of the Joybee GP1 that debuted in 2009, with improvements to brightness, contrast and resolution while also introducing a portable battery pack that can provide up to three hours of power. See also: Group test: what's the best projector?