I bought the bottles so I could have one batch brewing while another is aging or carbonating. I will have to wait for this fall to get going again. It's too hard to keep the brewing temperature in the right range during Arizona summers. Besides I'll be out of state for two months. My 3rd batch is carbonating now while I finish drinking the 2nd batch. So far I am pleased with the Mr Beer products.
While I prefer the 1 liter size but they are unavailable, these 740 ml will come in handy. Bottling can be a real pain so the larger the bottle the better. Very strong PET plastic and I'm looking forward to using.