I did go back to Hair Dynamix, and am so glad I did. I was really happy with the work that was done last time, but this time it was even better. I don't think I've ever been so happy with my hair, or had a hair dresser do EXACTLY what I wanted before. (Also, Una is fantastic! Book her if you go!)
Also, the customer service was great. I actually feel awful for feeling a little jaded after the last visit. Saw one of the same girls that greeted me last time, and it was about a million times better. Everyone has a bad day, and maybe I was too quick to judge.
Will definitely be going back again and again and AGAIN!