My booking was pushed back half an hour and I was not notified of this until just before - this was annoying as it was a Friday night and I was at the salon after it closed which initially made me feel a bit awkward. However the shellac treatment was very good and the staff lovely, even when I spent a while choosing the colour! I would come back and recommend to a friend however advise confirming with the salon re: your appointment as apparently using treatwell means they make double bookings.