Anyone ever use Mvevelopes or mint.com for keeping track of their finances?

If so do they work and how safe is your information, ie. bank account numbers? Are there any others out there that are good to use?

Anyone ever use Mvevelopes or mint.com for keeping track of their finances?
I use Quickbooks, which is software you have to buy, but my banks %26amp; investment brokerages all export info directly into the software at the end of the month so it is really easy to use...however, a columnist on Yahoo Finance, Laura Rowley, is a huge fan of Mvelopes. You could try googling her name %26amp; "Mvelopes"; she talks about the safety of your information when using the service. Also, for any of those budgeting sites, check that you are connected on a secure server no matter what you go with (https:\\ prefix on the url).