We use jira, svn, maven _and_ j-unit. Jira I think is pretty good. But that's only in comparison with what I was using before, which was clear..quest? Clearcase? One of those. Man, what a terrible program.
In comparison, despite jira having a UI that was clearly created by developers, it seems quite dandy for tracking (and logically linking) bugs.
If what you used was for bug tracking it would be clearquest, rational clearquest. A program only the darkest souls of the empire would embrace.
I was held at gunpoint (exaggeration) and had to administer it. Note, this was a 7 year old version of clearquest at the time.
JIRA is clunky but it is effective. I ought not say more as it would be impolite.
I've had to formally evaluate bug tracking and issue tracking systems. They all suck to one degree or another as each has a fatal flaw, in my honest opinion. I probably ought to write a blog entry on the trackers I evaluated and the level of spam that the commercial versions send out to evaluators.
In comparison, despite jira having a UI that was clearly created by developers, it seems quite dandy for tracking (and logically linking) bugs.