A customer has just reported to me that they cannot order more than seven images at a time... I would say that constitutes "broken" status, especially when it loses customers for me.
Definitely needs work before I could consider it reliable enough.
Furthermore, the styling rewrite from 2.x to 3.x has rendered the gallery display ugly in everything from IE8 and older. Looks fine in all the latest browsers, but not everyone has the latest and greatest and as a result 3.x looks a bit rough for those people.
Great idea... not so great execution.