I like how easy it is for me as an admin user, to create new tests and see results of those test right away! Also love being able to easily adjust my A/B Testing settings without having to contact support every time something changes or needs adjusting (which happens quite often).
There are some things about optkit i don't really enjoy but not enough to say they're bad per se - just different from what we were used too before switching over. We've been using this tool since last year and have seen our conversion rates go up by 10%+.