I have been using the z600 for almost 2 weeks now.

The phone is stylish. At the beginning, I thought it is big, but actually it has very good size and comfortable fit in my hand. The color screen is nice and bright (except under the sun). It's exicting to have polyphonic ringtone. Voice recording/command are kind of cool. I like the flip form-factor and the bluetooth function the most. It's cool to able to use the Jabra headset with this phone.

In addition, I can sync contacts/tasks/notes to my Linux box (with a USB bluetooth adaptor), and send pictures. This is all done via bluetooth.

MMS fulfills my dream to talk to someone 1/2 way around the world and send them a picture at the same time. see here.

The phonebook that allow multiple number per name is nice for grouping people's number, but I hate that the SIM card does has the same format, hence some information is lost when writing to SIM.

I have not try java yet, just not a game guy.....

However, no phone is perfect and so is my z600:
- The GUI lacks configuration flexible. ie grouping function in tab for easier access.
- The access to shortcut is not optimzed and there are not enough number of shortcut available.
- The shortcuts from the nav key is not customizible.
- The more button is not configurable.
- Slient mode should be controlled by the volumn buttons (like in my Kyocera 8135)
- There is no user definite user profile

I could have get z500 if it's out... It has EDGE, PTT, and a better camera (not that I need it). But I'm happy with z600