Experience with DSM 2.2-0942 on DS106e?

[stationer]

Hi,

I saw that there's an unofficial firmware DSM 2.2-0942 for the DS106e.
Does anybody have experience with it?
Is the mail server also included?
Do I need to reinstall php (or phpMyAdmin)?
Is it possible to downgrade to the latest official firmware without problems?

Thanks in advance!

P.S.: I've installed DSM 2.0-0731.