I have a Z650 and thought Steve's review reasonable.
Quibble 1 - Though the noise level is normal for this class of camera, I am less accepting of it than is Steve. Keeping the ISO low in the PASM modes tames that problem.
Quibble2 - I've gotten sharper pics than did Steve in the last of the sample pics though all of my picshave beenhand-held. I'm on dialup and haven't viewed the other sample pics.
Hopefully helpful suggestion: Include in the reviews some of the 'old standard' pics. Probably half of humankind is now familiar with the brick building and the marina. They make for a handy comparison between cameras.