I use this with toodledo which its designed for, I finally got my full 150+ to-do list under a managed system - everything from work for clients, billing, shopping both business and domestic EVERYTHING!
Calendaring works fine on my Wildfire sync-ed with my PC desktop - Perfect.
If you want to sort your life's list of stuff to do then get David Allen's book on GTD, get toodledo and install got to do on your phone - in that order.
If your life is simple and you just need a shopping list then get something simpler.
However without Slide Me I could never have done it because Market does not allow the latest HTC phones to download so many apps - So a big 'Raspberry phtbbbBB' to Google and market!