I just made a post about it, actually. There's always something popping up and distracting me from doing whatever I'm trying to do. The UI is also distracting and cluttered. Drives me nuts. The UX is weird. Just don't want to spend more time figuring out how to do things that other clients just do. And I'm not taking the usual blame that comes from many in this space regarding bad UX. These are the things we should openly discuss and admit before the masses come in.
I love the good stuff about it, but I really hate the bad stuff so much that I never use it for more than five minutes. I love the devs too, but they need UI/UX help in my opinion.