I've tried several times to use Quicken's Mobile & Web and each time it has ended in corruption of my Quicken for Windows data.
- Transactions are removed and account balances are wrong
- Deleted scheduled transactions return, even after being deleted several times
- All activated Online Services are deactivated
Each time I have run validate and super validate which did not solve all problems, requiring a restore from an old copy, run Update, and reconcile current transactions. These efforts took many hours to resolve and are not worth any benefits I would have gained from having my data available in Quicken Mobile and Web.
For these reasons, I highly recommend NOT activating Quicken Mobile & Web.