I guess that depends on what you want / need...
I've got a .Mac Account, and I'm very pleased with it. Use it as my main email address (synced across three Macs and an iPod touch), hosting a website (well, it will be soon), syncing calendars and files across Macs, Back to my Mac, and screen-sharing.
That being said, I know there are better and cheaper alternatives out there. But, for what it's worth, I've never had a problem with .Mac.