Has anyone had a positive experience with Dr George teeth whitening kits, because my teeth seem to be going yellowish and I hate going to the dentist. If any one from the U.S.A. could comment if it is popular over there as it is FDA approved.

It's an old school peroxide-based gel, so will work.

Just be careful with that stuff. Professional dentists will use the same kind of thing (carbomide/hydrogen peroxide gel on teeth under a UV light) but they're more practised with it. Provided you are very careful, use it sparingly (too much in the teeth tray will cause 'overspill' and burn the gum) and not too often, it should be fine. However, if in doubt, leave it to a professional.

That said, I would still be registered with a dental professional regardless. The health of your teeth is just as is important as the whiteness of them, so ensure that you treat them well. You only have one pair, after all.