I see the Vista comparison a lot but I'm not sure I agree with it. I never thought Vista was that ugly, I thought it was more most of the computer hardware people were buying at the time just wasn't capable of running those visual effects (and I recall it was pretty buggy too)

It had a glassy aesthetic but the similarity doesn't go much further than that description. They didn't make all the buttons into glass blobs floating on top of the content with distracting warping effects; the window chrome was still generally separated from the content.