Cervini's 2 piece Tonneau Covers
Well, they look great when they are on the car. The problem is that they are not easy to install. Also, the rivits for the snaps must be really really tight. I had to use a 4mm medium length one because a 3mm short one pulled through. Once on, they are nice but you've got two painted surfaces in tight contact with eachother. There is the occasional sqeaking sound when I go over a hard bump.
They attack with two screws with big plastic hand turn handles. One in the middle and one toward the front that has a bar which clicks into a seatbelt thing at the other end.
They fit easily around a lightbar. They are only so-so for getting rid of wind. I found that the haneymotorsport windgard, combined with the light-bar, combined with this cover, worked well.
The reality is that I've only put them on a half dozen times and I was lazy about taking them off as well which isn't the greatest since that means my top was down when it was parked. It makes a better show-car thing.