Works like the more expensive pens.
I was looking for a whitening pen for a more reasonable price and found SupMed. (I use whitening strips on a regular basis, but it gets quite pricey, so I wanted to use a less expensive option in-between my use of white strips). SupMed's gel goes on quite smoothly - it's not too watery and I did not notice a strong flavor. I used mouth trays to keep the gel on my teeth for 20 minutes and noticed my teeth were slightly lighter on first use. I did not reapply the gel for another 20 minutes since I was was satisfied by the level of cleaning the SupMed gel provided.
Rating: 4 stars