Definitely do not ever be late. I couldn't get one of my 3 kids out of school in time and was about 1 minute past their deadline of being late and so they refused to see 2 out of my 3 kids.
Normally a great place but I am not happy with them not being understanding see the other two kids who I already took an afternoon off from work and pulled them out of school early. Now I need to reschedule which will mean another 6 months of waiting... Very disappointed. Might start taking them somewhere else.