Yeah, I have a pair of cheapies I picked up just for the heck of it. The problem is they cut your refresh rate in half and your resolution in half. I have to drop down to 800x600 so I can get a 150mhz refresh rate (any lower and you can see the screen draw, very irritating), but since every other line is for one eye or the other, you can actually see the missing lines with each eye in that resolution.
Still, even with all the faults, it is pretty neat flying through hangars offline. Online I can't read icons or dogfight at all though.