Ok, I've researched on the net, now I'll throw it out to you guys. ...and pardon me if this is the 100th time you've been through this. I looked through the threads and couldn't find this comparison.
It seems like there are lots who love RETRAX. But I'm thinking maybe ROLLBAK. It's a bit cheaper and although I like Retrax canister system, Rollbak isnt bad with felt lined underside.... I need some help here. please. thanks.

 

The other night there was a auction about ending for a new rollbak offered by Realtruck. I snagged it for $725. Couldnt come close to that ($780 next closest price) anywhere else so I figure it was a good buy. Later.

 

rollbak is relatively new for the 04/05 F-150 I've got one, love it so far (about 2 mos) picked it up online here for http://www.truck-bed-covers.com/Roll...eau_covers.htm $690 (yea the price says like 780, but they will honor their price guarantee and beat any price by 25.. so the cheapest other place was f150store.com follow the steps and you get a bargain. pics are in my gallery below

EDIT: guess i should read the whole post first!! enjoy your Rollbak!

 

I have a Roll N' Lock, it is very similar to the rollbak cover. I have had it for 14 months now and still love it. Check out my profile for the pics