I thought I'd update my experience with having had the Focupix 16:9/125" (120" viewable)/1.3 gain screen for about 14 months now. This is the electric model with RF & IR remotes. This screen has proven to be an excellent buy for ME. It has never had ANY wrinkles or waves, just a TINY bit of curl-in at the edges that is only viewable when looking for it from the side. It has been used a lot and been up & down many, many times and still works great. Sorry to hear (read???) that some others have had less than favorable results.
As to customer service I really can't comment other than to say that shipping was very fast because I've never needed it. Maybe I just got lucky but I didn't want to spend a lot of $$$ and this screen has turned out to be a great buy for me. JMHO