I have the Solid Fold. I have had a few problems with it, but keep in mind I've had it for four years now. The clamps on one of the sides is broken and sometimes falls out of the cover. This is because the plastic cracked when it was -35C one cold winter morn while I was trying to open it. A plastic fastner on the back cracked as well during a routine removal of the entire cover from the truck. It still works but is now sitting a bit funny. Right out of the box there was a plastic seal that for some reason crossed over from one hinge to the other; I just ended up cutting it with scissors and I've had no water leak issues. Lastly the paint came off of one of the hinges while at the car wash; I repainted it with spray paint and it looks fine.
One thing to also keep in mind is that it gets in the way if you want to install a cab guard. I'm thinking of just making a few cuts where the cabguard would install and hoping that it fits, but I probably won't be getting one for another 3 months to a year so I'll see how that goes.
Despite all these problems I actually really like the cover. It looks slick, can support a fair bit of weight, has weathered well over the 4 years and is really easy to open and remove. I can remove the whole cover myself within about 4 minutes. I like that it can't be cut into but you could if inclined shove something under it and just pry it up a bit but that seems a risk with any cover. I'd probably buy another if I needed one, but I'd pickup a few extra clips at the same time!