I'm looking at an account at 01.com with their BES/ZCB service. How well does BES/ZCB handle multiple different calendars and addressbooks? how about subfolders within one calendar or addressbook?

My current experience on my Blackberry with BIS & GoogleSync & Funambol has been fairly poor - they seem to be limited to one calendar/addressbook per email address, which is really not what I need.

If BES/ZCB combo will really do what I need, I don't mind spending the extra monthly fee, but I'm not too keen on going through the setup cost and time if it really won't work the way I need it to work.