I am an avid Thai food junky and I have tried just about every place in Charlotte - yes this is the highest price, but it also is the best. Pad Thai, Crispy Duck, and Green Curry (aka the Thai trifecta) are all excellent.
Downsides - paid parking (I mean really?!?) and service can be spotty (waitress told me, "I don't really like Thai food").
Overall, if you want the best Thai in Charlotte - go here.