Excerpt: I am a big PDA person currently owning a Treo at this point.
Well, the 6750 was maginifficient as a smartphone got back in 2002-2003. The phone was a good phone for texting, but it was green screened so it wasn't good for picture quality on web.
The phone was pretty big. Probably as big as a Kindle I estimate, I've never touched a Kindle or seen one in person but it really has a Kindle form factor.
Pros: For how big of a phone (long it is) it is actually kind of slim.