Temp control kettle is the best upgrade I have ever done with my brew setup and it's not close

I've tried great coffees from great roasters (I really like TW), have a great hand grinder and do my own water but getting a temp control kettle has completely changed my brewing experience. Before even after the upgrades to coffee, grinder and water, I still had issues with consistency, but after getting a temp control kettle, after about 2 months, I have never had a single bad brew.