I don't know whether you used "users like my mom" just as a manner of speech, but in my case that is literally true - my mom does use Ubuntu and I quite appreciate the simplification of Ubuntu's interface that's happened over time which has made it possible for my mom to use it.
I have my long list of Unity bugs -- I don't think Ubuntu should have put all their chips on that awful implementation of a mediocre interface.
I agree with Eric Raymond that the most worrying thing is not the poor quality of the new Ubuntu release, but that new releases are going backwards. That takes away any hope for improvement.
Unity is still unusable at times due to its window management bugs. I way really hoping for better upon its second iteration. (But this just makes me sound complainy.)
