I recently purchased and put on my new access tonneau roll up cover. I bought it from autoanything for $340. The quality is great. It holds out the rain quite well. We just had all the rain from Irene, and I think all I got was a few trickles of water from the downpours we had. I didn't get the tailgate seal. The cover is tight and perfectly flat. Has tensioner adjusters for summer and winter temperatures. It also allows for the use of the front and side rails with the normal tie downs. What I love most is the cover follows the lines of the bed perfectly. Here is some pictures.
This sliding tab is how you unlatch the tonneau.
This tab is a lock for extra security if you prefer to use it.
At this point I didn't have my tie downs in the slide rails, but they do fit. I would advise to putting them on before putting on the tonneau hardware.