Not at all. It allows you to concentrate more on the recipe and less on the technique. I've homebrewed for years and my biggest complaint has always been it's

Not at all. It allows you to concentrate more on the recipe and less on the technique. I've homebrewed for years and my biggest complaint has always been it's damn near impossible for me to make the same beer twice. There are so many variables in the brewing process itself that are hard to control (probably the biggest being temperature). Even with a very tight process it's likely that you're going to get some variance that will affect fermentation. This appliance removes a lot of variance.