This may be a bit off-topic for this thread, but I thought I'd put it here for completeness.
My 133" tab tensioned monoprice screen was picked up yesterday (RMA'd because of the waves that couldn't be removed).
As luck would have it, my DaLite 133" cinema vision was delivered the same day. I hung it last night and thought I would give some comparisons.
#1) The monoprice screens absolutely WIN when it comes to the mounting bracket. The fact that they use the same bracket for ceiling or wall, and that the bracket basically reaches out and grabs the screen making installation a breeze should not be lost on anyone. Of course, you pretty much do this once or twice and never again. The DaLite ceiling mount is a royal PITA. You have to basically get someone (or a bunch of people) to hold it up to the ceiling while you drive the anchors in (after marking and pre-drilling holes). Because of this, I used the wall mount...which at LEAST lets you mount it (the bracket) to the wall without having to hold the entire thing up in the air while you are doing it. Once up, it wasn't anywhere near as easy to get the screen onto the bracket. But, once it was there, it was fine.
#2) The monoprice screen comes with IR remote (this is extra for the DaLite)
#3) The monoprice screen comes with projector control (if the projector has an output, it can control the screen up/down) (this is extra for the DaLite)
#4) The DaLite screen comes with a wall switch for up/down/stop (that doesn't HAVE to be used if you pay up for some other control like the ones listed above)
#5) The monoprice screen comes with a captive power cord that needs to be plugged into an outlet. The DaLite gets hardwired. For me, the DaLite is the better choice here, since it means I don't have to figure out how to hide the power cord, and have a code-compliant outlet to plug it into.
#6) The motor on the DaLite is slightly quieter than the monoprice "somphy" motor. (And I didn't get the DaLite "silent" motor)
#7) The case is a bit nicer on the DaLite (textured, not smooth black) [just MHO]
#8) The DaLite screen material is ever so slightly thicker than the monoprice material. It also doesn't smell like a pool toy, thought it may have a slight scent of it's own. Hard for me to tell since insulation was installed the same day, and that certainly has a scent to it...
#9) The tensioning system on the DaLite is quite a bit more substantial than on the monoprice screen.
#10) Lastly, the DaLite screen is actually flat. ;-)
All that being said, it was nearly twice the price! So, if you get a good one, or you can be satisfied with some waves, the monoprice screen is a bargain. I just wasn't willing to settle after investing over 10K in theater equipment. The other thing I gained here was some "gain" in screen material. Monoprice only offers 1.0, and, by going with DaLite, I was able to get the 1.3 that I really wanted.