Very efficient service and really good value - I just wanted a quick trim of my hair for a reasonable price and got exactly that. I'd recommend going early in the morning - my appointment was at 11 and it was only just starting to get busy.
I had booked a wash and blow dry through Treatwell and when I got there they said they did not have me scheduled. When I showed them the confirmed appointment they said they would fit me in, which resulted in two different people 'speed drying' my hair. The results were different on each side and I had to redo my hair the next day at a different salon.