It works, but in the final analysis, the product is not polished. Lots of minor, irritating issues, certainly with 1.5.8.
Forums are not tremendously active either. I still have threads there from weeks ago with no response.
If you decide to install, and really run it in a production environment, arm yourself with lots of patience.
Currently there is no issue reported on Stable Version 2.2.2.
If you are using the 2.5 RC1 :) if you have some issues, please just realize that this is just a Release Candidate.
Don't hesitate to report me bugs via email has this is written on the main page (and not in the forum for 2.5 RC1)