Had the SPV range since they come out. This version offers some good addtions qwerty keyboard being the main Physical improvement the other is software Windows Oiffce which is great for adding projects which you can carry around and work on. I'm wiating for a few more addtions in the SPV range which would make this a Dream Phone and they are a better camera 6meg and optical zoom and a GPS receiver inbuilt. These additions would make this phone the top dog.
I use GPS sat nav for hiking and the older version 600 was a tough phone and could take some serious knocks, this slide feature on this phone may be its weakest point.