The fermenter is $80. The CO2 transfer system is $100 on the NorCal Brewing website. The whole thing is less than some winemaking kits. I didn't realize these plastic fermenters could take enough pressure to to transfers this way. It's CO2 driven, but presumably it would work with nitrogen or argon just as well. I'm tempted to try it out. What functionality is it missing vs the All-In-One system? Just bottling?