I joined the Avsforum just so I could take part in this discussion.
I currently own a Benq 1080ST and two pairs of 3DTVCorp DLP link glasses. Both were at a reasonable price. While I'm fairly happy with the projector I would NOT recommend the 3DTVCorp DLP link glasses.
- Sync: I'm very impressed with their ability to gain and keep sync, no issues with turning my head away from the screen and they even keep sync (or regain it quickly) when I leave my home theater room. (I don't have a bunch of ambient light in my home and my theater room's lighting is completely controlled)
- Cost: Dang, these were inexpensive. Two pairs for slightly more than what other companies were charging for one.
- Fit: They seem comfortable enough. Not as good as my Samsung active pairs for my plasma but they fit over my regular glasses good enough
- Performance: Here's where they fail for me and got me looking here and elsewhere for replacements. The glasses really have to be fairly parallel to the screen and centered (L-R, U-D) to work properly.
If your head is centered to the screen width AND height and you don't turn your head much (or at all) these glasses work fine. However if the center of the screen is higher (vertically) than your eyes you may (or WILL) get cross talk. If your seating placement is not centered (left-right) you'll get cross talk and redish blacks. Even if your perfectly centered (V/H) and your turn your head L-R, U-D you'll get cross talk and redish blacks.
I've even considered raising my chair up a few feet to help fix the problems, however that still leaves me with the Left-Right issue. The 1080ST is projecting a 100" image 7-9 feet away from where my head is while viewing it.
I'm planning on ordering a pair of the "v3.5" (forget the brand) mentioned earlier in this thread to see if they perform better.