I pre ordered one of these and like others, was emailed it will ship the end of August. I had the same concerns about temp control, but figured I could build a large upright version of SOF. It will sit next to the chest freezer I use to store my harvested yeast and hops. If the frozen gallon jugs do not get me to the 65 to 67 range, I can pull some cold air off the chest freezer to augment the cooling. I am sure you can get to an ale fermentation temperature with a larger upright SOF and some creativity. (For lager, I will continue to use my keezer which doubles as a fermenter.)
The other idea I had is to augment the frozen jugs with thermoelectric. Alone, themoelectric is iffy but might be able to work with the ice in the SOF design. Cooling the air with thermoelectric may help the ice last longer and avoid excessive swapping of jugs in the larger chamber required to house the large size of the Fastfermenter.
I like the idea of a conical and wanted a dedicated fermentation chamber. I can have two batches fermenting with temp control, or a single batch of ale fermenting while the keezer can continue to be used to dispense kegs. The benefits of the conical remain to be seen, but the price allows for a chance to experiment and isn't that what makes homebrewing fun? I have some prelim sketches done, but will not get serious until I have this thing in hand. I will be glad to share my experience/frustration once it arrives.
Cheers,
Ben