It's great. I'm on vanilla Arch now, but EOS would be my first choice if I ever wanted to change to another arch-based distro. The only time I ever encountered any issue (that's not my fault) was the grub issue last year iirc. Other than that, it's been pretty smooth. It's basically Arch with a few QOL features preinstalled.
Edit: just like you, I was on Mint for years before switching to EOS. It's easy, don't worry. You'll want to start reading, though. The wiki and aur are great.