After using the PPC phone for a while, I've decided not to use it to reply to e-mail.  Connectivity is the main issue.  Sometimes the thing syncs up without a problem.  Sometimes I can't connect at all. 

What's most frustrating is when it quickly and effortlessly connects and pulls down e-mail.... then I type a reply (tap a reply -- kinda like morse code)... and then I click to sync and send my reply.  Can't connect.  It's very annoying.  And it's happened so many times that I've decided to use the device as a reading device, not a writing device.  I still like the larger screen form factor over the smaller smartphone screen.  But I'm not going to use it as an input device anymore.

If I see an e-mail that requires a quick response, the integrated contacts feature is super.  I can call the person back and address the issue.