I have had one on my truck since I’ve owned a truck. I’ve had solid fiberglass cover, roll up soft ones and retractable canister held ones. I really like the security of having my stuff out of site. And like @USMC3099 said, it’s balance. When I had the fiberglass cover I couldn’t haul anything very large without removing it. But it was dry and secure when on. The vinyl ones are the least secure but still keep stuff out of site and dry. The retractable ones (I’ve had Retrax and Roll-N-Lock) are my favorite because it’s the best of both worlds, but they do have a canister that takes some space. I’ve never had a backflip style but I see the attraction. It’s hard, dry, secure and can be folded to give you access to 99% of the bed space. It’s it’s a good deal, and you have the cash, give it a try. I don’t think you’ll be disappointed. Once I bought one, I haven’t had a truck without one.
good luck!