It's not too bad, but you can do most of that stuff for free with other applications. I've actually been thinking about dropping it now that find my iPhone is free, but there are some things lime the MobileMe gallery that I just can't find a good free version. I'll make a little list of things that I would use to replace MobileMe.
E-Mail - Gmail
Contacts Sync - Google Contacts
Calendar Sync - Google Calendar
MobileMe Gallery - Picasa or Flicker (Not as much storage)
iDisk/other syncs - Dropbox (Not nearly as much storage)
Find My iPhone - Is free now
For a little over $8 a month it isn't too bad. The nice thing about it is it all works together in one place and looks nice while doing it. The only problem I've ever had with it is that the iDisk sometimes gets out of sync and you have to reset it. Same with contacts.
Hope that helped a little.