I use the Fermonster 7 gallon and 6 1/2 gallon Bigmouth Bubblers. I like the large openings in both when it comes time to clean or remove hop bags.Bob - You reminded me about the Fermonster, Thanks. I had forgotten about them - don't shop on MoreBeer all that much anymore. I like the Fermonster - you summed up the benefits well. I also like that they use #10 stoppers since I have a bunch from my BetterBottles. I need to order some keezer parts from MoreBeer anyway. Now to decide on the 6 or 7 gallon. I'll probably go with the 7 gallon - space is nice and it's only a dollar more.
The Bigmouth Bubbler has some dimpled areas which make it a little harder to clean, but a microfiber cloth helps. It also has a 2 piece lid, which some have problems with.
I like the fact that the Fermonster is much smoother and has a single piece closure. Personally, I prefer both to BetterBottles, if for nothing else the larger capacity. I find no need to use a blowoff on the Fermonster and seldom on the Bigmouth Bubblers. I ferment 5.5 gallons.
Thanks all for the input!!