When I use an AI correctly, I feel much better. I have a pretty narrow range of E2 that works for me, so AI dosing is a little tricky (regardless of what testosterone dose I have each week).
My humble opinion - Using a certain dose of an AI isn't a good recipe for success. If someone uses too much, which can be different for everyone, they'll experience all the negative side effects and long-term health consequences of E2 that is too low. If someone is adamant about never using an AI...fine, but they may eventually discover it's causing ED or emotional symptoms short-term that could've easily been avoided, and 10-20 years later that it's a factor in accelerated BPH and other prostate problems.
You'll eventually find that there are tons of guys who feel great using an AI, and tons of guys that feel horrible using them. Flip side is that there are tons of guys that feel great using no AI, and many that feel terrible without using them.