I just bought one. Excellent for the price.
I haven't had the chance to fire it yet but I am very impressed by how quick this sight is at 1.1x even if it's not "true" 1X. I also love the AGOC-style bullet drop compensator up to 800 meters where the horizontal lines are the width of a person's shoulders at given distances. The reticle illumination may not be bright enough to be useful under bright sun conditions but the big fat aiming donut is just as clear and easy to use as a red dot. So that means that you don't depend on batteries to be able to use that sight at 1.1X.
The lenses are extremely clear and it may be a bit heavy but it feels very solid.
There are other sights out there which I never tried but you can't go wrong with this one.
If you want to buy one, make sure you have the last generation so you can have the CQB 223 reticle with the ACOG style bullet drop compensator:
http://i65.photobucket.com/albums/h228/strabismo/223cqb.gif(since I couldn't find any pictures of it, this is a quick photoshop)