I bought a Groupon for the ZOOM! whitening for like $99, I thought, for that amount, I'll def go for it.
um...HOLY HELL...SOOO painful!! I dont normally have super sensitive teeth (every now and again ice cream can hurt but like once in 5 years)...so I thought no problem...the doctor's office was so nice, clean etc...but when she finished I literally got in my car and started BAWLING...now crying...BAWLING...so much pain shooting through the nerves I couldnt drive for like 30 minutes...I was in that horrible pain for 48 hours and two tubes of "Oragel".
Sooo...FYI if you are considering it...be ready...