Review title is Performance Just Like the Dentist Office BUT for ~ $140 on Sale now [SEP] We tried several home teeth whitening kits and most gave marginal results.  But this kit, performs just the same as what you get at the Dentist.  Look at the picture I posted.  Its the teeth color card. Out of 1 - 20, my wife started with 14 top and 11 bottom. She drank a lot of coffee, red wine, etc...We tried this kit and got her down to 4 top and 2 bottom. Her teeth are just as white as the dentist office whitening service.  Here is what separates this kit from others: 1) Performance is second to none, 2) You get most of the whitening results the first application which is 8 minutes.  Remember with this kit, you have to do 4 sets of 8 minutes per day.  Meaning a total of 32 minutes total per day.  Getting most of the whitening in the first 8 minutes is amazing results 3) It only takes 5 days and 2.5 vials total out of the 10 vials that comes with the kit.  Meaning she can maintain her whiteness for the next 4 months without spending more. The procedure costs ~$400 at the dentist. You pay ~$140 - $150 for this kit for the same fast results and can maintain it for 4 months, depending on your teeth.  Meaning out of all of the teeth whitening solutions available, this one ends up being the MOST COST EFFECTIVE with guaranteed results.  Meaning if your teeth were able to whiten before, you should get the same whitening again.  My teeth can't be whitened because how they developed before my permanent teeth came out. I had a high fever so my teeth are a little yellow as a result and can't be whitened much even at the dentist.  At any rate, this is the real thing and you keep the blue light system and battery pack.  Just buy more vials later when you run out.  Enjoy!