I saw it on Sunday afternoon with my wife, and felt the same way Kerry did: it was good, but not great.
It did resonate with me in a special way because I had a stuttering problem when I was 4 to 5 years old on up. My parents took me to speech therapy, and the stuttering slowly subsided, although didn't completely go away until I was an adult.
I still very occasionally have problems with words that start with certain letters, and I can't explain why I do stutter. I know I am going to stutter on a word before I say it.
What works for me are the same kind of tricks that Lionel used on Bertie, but without the swearing.