I haven't found any concatenation plugins which didn't bug out in many different situations or which used nasty hacks to make them work. Hopefully this one works better.

I do prefer the Minit plugin's approach to cache refreshing though. It does a modified date check on the files, then MD5's it and uses that for the file name. That way whenever an enqueued file is updated, the cache is refreshed automatically. It would be much more convenient than having to wait for a Cron job to fire (or firing it manually).