I have the 326, I think I've lifted the lid twice since I put it in.
If you have a soft top, you can't open the lid on the 326 without first lifting the top. It's a royal pain, but I understand that this problem isn't Tuffy's fault.
My bigger issue and one that is Tuffy's fault is that there isn't any means to hold the top in the lifted position. It would great if it had hydraulic arms like on the glass for the hard top. I'd even settle for a prop rod that I had to manually put in place. As it comes, if you need to reach in the back to pick something up with two hands, you need another person to hold the lid up.
I haven't hauled anything on top of the lid. It's fairly slippery, so you'll need a rubber mat or spray on some line-x or something to keep stuff in place. And you'll need to add your own tie downs because there isn't any means to secure stuff the way it ships. I would think you'd scratch it up pretty bad if you didn't protect it from whatever you were putting up there.
It keeps my stuff out sight and away from thieves, so it servers its purpose, but if I was going to do it again, I'd save the $100 and get the fixed lid version. The flip up lid seems like a total waste.