I've been using one for HT since February. I have found that it does quite well with upscaled DVD's (I use a modded Cassini HTPC and a Rock +). The Cassini is sharpest at native resolution (1024x768) at 75mhz, but motion judder is a bit of a problem. The Rock is judder free, but I've only used it at 72mhz, the refresh rate recommended by Mark R. The image is softer with the rock, but it has its advantages.
Light spill border around the DMD image is apparent, color is very good, contrast could be alot better but above average for DLP's. I use a whisperflow hushbox for it, but I need a new front panel for it (it originally housed an LT100). I just received my Panamorph, but have yet to try it with the Plus. I am currently using a Kodak filter with slight magenta in front of the lens to correct for the greenish cast from the 1 chip design- this works well and I highly recommend it.
The biggest bummer, which I found out after my return period had expired, is that it won't display an HD signal. I don't understand why they did this, since the Plus 1100 was HD compatible. I bought a Hipix, tried to make it work, then checked around to find out the bad news. I sold my Hipix and since I bought a Rock instead of a Vigatec I am hoping (maybe in vain) that TAW will include HD scaling to native resolutions in a future version of their feature set. Until then, no HD for me! I will upgrade my PJ when there is a significant jump in technology (higher rez chips, serious blacks, new colorwheel or 3 chip designs).