DH wants me to get the Harbor Freight GH. The price difference is just too staggering. I'm sort of tired of researching and shopping around. $606/delivered when all is said and done with the coupon. The coupon can be used once a day thru March. The openers are on sale now for $25.99 each. I can use the coupon over the next 4 days and save a total of $32 towards them. This is a big decision only because I am the builder. Scary, huh? If it falls apart we won't know whether to blame the greenhouse or me.