i have been on the beta test the whole time, and i liked it from the beginning. it started to take shape with beta 3, and everything started to click when they started releasing release candidates. the final looks like windows 2000, and that stability is comparable to windows 2000.
now, this may not be true for all people (that they have really high stability), but it is for a lot of people. the other nice feature is the shorter startup time. most people's boot time will be decreased by 10 seconds or more.
to sum it up, the interface is slick, but there are more improvements than just the look. thousands of little bugfixes have been made, and real mode DOS support is gone, so this finally might be a decent version of windows 9x.