When the HD33 was released last year, it was, at $1499, the first under $2000 3D capable, 1080p projector, to ship in the US. We were extremely impressed.
A number of additional 3D capable models started shipping since, which tended to make the HD33 not stand out, to the degree anticipated by my review. That is, the brighter Epsons and some others made it hard to stay focused on the some of the Optoma HD33's strengths. This Optoma measured in the 1100+ lumen range, both calibrated and "brightest" (not much difference between the two). That said, it is a projector that seems to be extremely well liked by those that now own one. It lacks the brightness of the similarly priced Acer H9500BD, and also the placement flexibility, but calibrated, last year, it did more accurate color than that Acer. Since then, Acer upped their game by adding missing color controls.
If you can get past the placement flexibility (basic 1.2:1 zoom, no lens shift), and not too great lens offset, the Optoma HD33, is definitely a serious contender for those who want the look of DLP, and very accurate skin tones and color in general.
The Optoma HD33 has very good build quality, a solid feel, and in general, since I already mentioned the Acer, compared to this HD33, the Acer is a definitely "rough around the edges" in terms of features.