Brewjacket has been revolutionary to my brewing. With about 100 batches in my history, this device has, for the first time, enabled me to prevent fermentation temperatures from hitting the zones that produce off flavors in the warmer months. Secondly, its enabled me to keep the fermenters in one location in the garage - outside of our living room and light protected so the sunlight problems are not an issue. Lastly, as a result of this, I am able to pick any style of beer, at any time of the year to brew. I've greatly enjoyed the personal interaction with the team at BrewJacket and their rapid responses to fix my concerns without hesitation. I greatly look forward to many new brews with precision control.