I have 4 of the fast ferments and have done more than 80 batches of beer in them. After using my 1st one for a while I realized I needed more FV's and looked long and hard at the other options before adding to my stable. I brew upstairs and have to carry the FV downstairs where the fermenting and bottling take place, the extra weight of stainless FV's, when added to the weight of 7 gallons of beer is far too much for this old man to carry down a steep staircase with a 180* turn midway. Of the plastic options the Fermentasarurs appears to be too top heavy, and some of the reviews I read indicated that they are pretty flimsy. I really like the Catalyst's larger diameter bottom opening and the ability to use mason jars, but it also looks to be difficult to pack down stairs, and there are a number of negative reviews that seemed pertinent to me. I have some complaints about the design of the FF's, the thermowell is poorly located and the thermometers are wildly inaccurate, I eventually removed the wells on all of my FV's and plugged the openings, fermometers are inexpensive and more accurate the stock FF thermos. I wish the Fast Ferments had a larger diameter opening at the base as sometimes sediment will adhere to the base of the cone instead of making it's way into the sediment ball. I have built wooden support stands and portable bases for all of mine, using the wall mounting brackets. The support stands were specifically designed to facilitate carrying the FV's down stairs. I really need at least one larger fermenter, if the Fast Ferment 14 gallon ones were designed for use with the wall brackets I'd buy one, alas they aren't compatible. I'll keep looking for a viable alternative.