So far so good. It can't stream hulu.com (dvd quality) video for long though-- it heats up and then the processor throttles down impacting the refresh rate. The machine excels at basic document creation, web browsing, etc. For this kind of work, the fan doesn't even turn on and my 1.6 is exceptionally snappy.
The screen can get extremely bright. I'd never use it at max brightness.
Any graphics intensive work, games will drain the battery quickly.
For web browsing, e-mailing, etc, the battery lasts a little over 4 hours in my experience.... and I'm a pretty heavy wifi user.