While on the trial you are limited to just 10 GB of storage but have all the other features as far as syncing, e-mail, and being able to publish an iWeb site. If the trial lapses, the account can be reactivated but anything that was stored online will be cleared and the e-mail account will be disabled from being able to send/receive. The trial is set to auto-rollover to a full membership (you need a credit card to sign up for it) but you can opt out anytime before the trial expires and not be billed. Hope that answered your questions.