This Review Title is Horrible Flavor, Non-Existent Results and the content is: Being a tea and coffee drinker, my teeth have a tendency to stain from time to time.  I have used OTC whitening products in the past with a lot of success.  I was originally looking at the Colgate pen, but saw very mixed reviews and decided to go with this one.<br /><br />Packaging, top notch.  The colors, construction, and branding are all on point.  However, that's where, for me, the good news ends.<br /><br />To start the pen, be prepared to click 30-40 times to get the first bit of gel to come out.  After that, sometimes just opening the pen is enough to cause it to ooze... other times, you are going to be clicking 5-10 times to get it to dispense the gel.<br /><br />To prepare the teeth, I use a Kleenex to wipe the teeth down so they are dry.  I apply a generous coating of the gel to all the teeth in front (top and bottom)... Once applied, I leave the mouth open and teeth exposed to allow the coating to dry (suggested was 30 seconds... I went up to 1.5 minutes with no difference).  Once you close your mouth, the product immediately starts foaming (H2O2).  The flavor is not good... I know this is subjective... but it is like dropping cinnamon red hots into Vanilla Coke... letting it set until flat and then watering down to almost no flavor... [in short, back wash.]<br /><br />After 9 days, there has been no change in the color of my teeth.  I have used a color guide from my dentist to follow the process, and I have stayed right around a 6.<br /><br />Horrible taste, ineffective whitening, more than $20... Yeah, not for me..There are other information for this review, one is This reviewer did not purchase it and the other is 1 people think this review is helpful.