I saw that Costco ladder at Sam's Club, I didn't much like the hinges although it looked to be a good value. I bought two Gorilla brand ladders from Home Depot, I think the the 12 footer was 99.00 and the 21 footer was 159.00. These are pretty nice ladders; the hinges are billet aluminum, nice locking and sliding mechanisms and they came with an extra set of hinge plates so you can make two ladders out of each one and use them for scaffolding. They're very sturdy and I have no qualms about climbing them to the top rungs. Both are rated for 300Lbs. and after having climbed other ladders rated for that weight I think these are under rated. Their only flaw is that they're heavy.