I'd like to echo this comment. Piotr has been amazingly responsive to problems with bugs or performance issues that we have hit (the Mozilla Servo team). Apart

I'd like to echo this comment. Piotr has been amazingly responsive to problems with bugs or performance issues that we have hit (the Mozilla Servo team). Apart from the UI, Reviewable also handles many of the really ugly "they did an over-under rebase, force-pushed, did another, then flipped back" cases that come up with longer-lived PRs and manages to keep the review state reasonable better than any other tool I've seen. And we've tried quite a few of them :-)