I have the Peragon Cover. It's well made and has served me well. I bought it due to the fact that while open, it does not block vision out the back due to it folding down into the bed. However, the ONLY complaint I have is due to the fact that it folds down into the bed. If you travel with tall items in the bed (5gal Bucket, Suitcase, etc.) and the cover closed and those items get pushed up the the cab side of the bed, you cannot retract the cover. With the panels being approximately a foot each, they slide down a rail into the bed, meaning they need a foot of clearance to retract into the bed. I've had both the above mentioned items do this and subsequently had to crawl under the cover to remove them. I've considered putting a bar across this area to prevent that in the future, but its not everyday occurrence.