The PJ10 has the same basic design as its siblings, the CX130 and CX160; the door is just a little thicker to accommodate the projector and stereo speakers. There's also a slider on top that allows you to adjust the projector's focus.
The PJ10's low-light video quality is passable; smeary and noisy, but with good color saturation and decent detail. If you plan to view your videos only through the projector, on whatever surface is available, you won't notice these problems, however.
Colors in outdoor light look snappy and saturated, and should please most users.