I find it almost unusable. The forced validation concurrent with any typing is an absolute nightmare. I'd love to push my company to migrating all the way over to Youtrack but rule editing becomes a tedious exercise in typing everything in a perfect sequence (heaven forbid you need to hit backspace). I can't even highlight things? Come'on guys. I'd rather code in notepad and get a global "won't run" error if there's a syntax problem. At least then I could at least type things.