Bitbucket's issue tracker is such a pain to work with. I remember being redirected to a new page whenever I had to create a new tag. Then I'd loose the content of the issue I had started to write, something like that.
https://bitbucket.org/site/master/issues/2874/ability-to-sea...
Integration with Jira is nice though.
Its slow as heck.
The UI is clunky.
The 'projects' made it hard to find anything and broke bookmarks.
... but the downtime is the killer. Last week was the last one.
Jira, HipChat and Confluence are really nice tools, but pricing seems to just snowball.