I have the SolidFold 2.0 for a year now.
Likes: security and convenience of the lid, light weight for easy handling, able to open/close tailgate without opening lid, no rails to get in the way, ability to open it for 2/3 access to bed with it on, and easy to remove when I need the full bed.
Dislikes: has developed slight dips in the top where the front clamps are located, can let in a little bit of water on heavy rain along one side of mid hinge.
The dislikes are minor compared to the overall utility and convenience of the lid.
Construction is good, but it remains to be seen if it will last as long (13 yrs) as my previous one-piece fiberglass lid from my old truck. I suspect not but if I can get half that time with this one it will be worth the investment.
The old one-piece was heavy, cumbersome and hard to remove/store so I will never go back to that design.