I love the idea of this toothbrush. I appreciate the versatility of it and think the quality of this toothbrush is similar and comparable to other toothbrushes I have used by Colgate, which is good. The fact that it comes with a whitening pen is great and it's really helps you maintain a bright smile. The size is average and I appreciate that it's still compact even with the whitening pen. I think it's genius that they incorporated the pen to fit inside the toothbrush. The only complaint I have is that I don't think you should have to remove the pen to use it. They should have somehow allowed you to apply the gel by pressing a button and having it dispense from the actual toothbrush head so you don't have to take it out. Other than that I enjoyed using this and recommend it to anyone looking for a multi benefit product.