The performance is absolute dog shit. Every interaction with it painfully slow. For example, the page to view a single issue is almost 20MB fetched over 100 HTTP requests and takes 10 seconds to load. This is without cache. With assets cached, it is still 4 seconds to render. This is the fastest interaction by the way. Everything else is worse.
Maybe some of this is my organization's fault. I really don't know. What I do know is that it is so slow that I dread every interaction with it.