Alright, installed the Extang Revolution today.
Oh boy, it was a pain the ass. The clamps were not threaded properly so the bolts kept ******** in sideways. Took me probably about 2 hours just to get all the bolts lined up properly. Next, found a problem! Layed out the cover and... uh-oh. It doesn't lock? Yup, the lock latches are too short to hook onto the top of the rail it's supposed to lock onto. Solution? Press the rail up and the cover down to force it in.
All in all, the cover is pretty decent. The materials seem decent quality. I just wish the threading on the clamps were better. I do notice some gaps, but I have yet to install weather stripping. I bought the cover for $380 (after getting my order cancelled for $365... apparently it was a "price mistake")
Too dark now so pics tomorrow.