A regular grid of dots mars the picture, especially on darker images or on fully saturated colors with lots of dark halftones. IBM made the posts in silicon as a part of its CMOS manufacturing process. Like Lady Macbeth's bloodstains, they won't disappear. Lots of connection possibilities. Dimmer than the competition.
Video looks rather murky.
One RS-232 control port and one monitor output with audio. Hitachi claims that it is the No. 3 projector manufacturer in terms of unit volume, if you count the various OEM partners around the world that relabel Hitachi products. I can't verify whether this claim is true, but I do know that Hitachi has made many projectors over the years, mostly for other companies. Now the manufacturer is making a push to sell products under its own name. And so far they have.