Only if you can get to it.
I had no problems with .mac until they went into a pay mode. Immediately following last (year ago) summer's change I lost the ability to access my account. I run 9.1 on a slow dialup and the pages time out before they fully load. I had to go to my folk's house (OSX, faster dialup) to access the page where I could cancel the automatic renewal.
Had I not gone to my .mac mailbox while at my folks I never would have remembered that I checked the auto-renew box last year. I would have been charged on my credit card and left with the chore of trying to get it removed.
I'm not the only one with this problem as the Apple help site forum is loaded with stories from hundreds of others who have the same problem. But I guess losing a few hundred or even few thousand people doesn't mean that much to them.