I brought my daughter here the staff was very friendly,but when we got to the back we'll that's where YOU!! Have to be careful!! My daughter was getting her tooth so they put the nitrous oxide on her.I was watching the whole time never seen my child look this way before,they would leave for a while and leave the mask on her,I took it off because how she looked,please keep a eye on your child when under this procedure, it can be dangerous so you have to research and make sure they don't over due it or get up and leave and leave your child under the mask I,ve heard of children dying in this position so PLEASE Abe careful