I got a lot of mess about the size of my old TREO 300. when I pulled it off my hip and military pressed the cover open the first thing I always heard was " That is a big phone."
I have just about purchased all the pda phones on the market and by far I was most happy with treo however comma i think the keyboard on the 600 is to small and the buttons are rounded at the top which causes me to be even more precise when I press it. The camera sucks big time.
I am on the other hand pleased with the increased access time to web pages the download features, sd slot and a new detailed manual. I am still in my eval stage but other than the keyboard and camera I think it is a good improvement........try camerascoop.com and compare the 300 with the 600 and sprint vs at&t