As great as I'd hoped.
I had high expectations for the Flex+, and they all were met. This product not only looks great, but has superior features that makes the fermentation process easier. The ability to oxygenate/carbonate the wort/beer, to transfer via a closed pressure system, to easily draw sample without exposing the beer to air, to maintain a constant temperature and to easily clean the fermenter and keep it sanitary all make for a fantastic product that's well worth the investment of money.