Teeth Whitening and how much it cost?

Have you got your teeth whitened in the dental office with the one hour tooth-whitening process? Does it work and how much did it cost you?
--------------------
One hour whitening can range between 300-500. Yes, it does work for certain people. Your dentist can tell you if you are a good canidate for that. The one hour is good for people that would not like to use the tray and bleach system at home, because that can take up to four weeks to get the same results. But, is is cheaper. So, are you impatient? If so, the one hour will do the trick. But, in my opinion, the tray system works better because you can do it for as many weeks as you can tolerate, hence, better results.
Source