Make sure that your teacher leaves his baggage at the door.
I went for a few lessons with a guy at a music store(not only did he refuse to teach me techniques I enjoyed,But the eric clapton esque music he did was terrible!He "knew" his stuff but had little skill in his fingers)Anyway...
He started to cancel the lessons due to "personal problems" and never gave me my money back OR resceduled!!!
And that was a small "mom an pop" music store.
So crappy teachers can be found anywhere
Try once,fail twice...