C.R.
Hi. I too have been looking into this. My husband got the tray and gel kind a few years ago and paid a good price for it. It did work but the price for the tray and gel kit was kind of crazy. And the bleaching that you get done at the office with the laser works great I've heard but again I'm shy from the price of getting it done. Upon researching this I found this video about a "how to" cheaply whiten your teeth without the dentist. Didn't know if you would be interested or not but thought I'd send it to you :)
http://www.youtube.com/watch?v=UqjPKja8VTk&feature=pl...
Best Regards,
C.