The delivery method makes this a total failure for me. It is a small amount that requires to be used multiple times a day. However, I can't figure out how to effectively get it rubbed into the gum line, where it is most needed, without wasting a huge amount. If you try starting at the gum line, then most the gel ends up between your teeth rather than your gums. If you start well above your gum line, then you can still work your way down to it. However, I still find it ends up between my teeth or 1/2 pushed to the top of my finger where it never got rubbed in. I found myself needing to re-apply it 2-3 times at one time just to make make sure I got it rubbed into the entire gum line. You might get the hang of doing it with less waste if it was just your front teeth, at least on the front of them. However, on back teeth, I just have no idea how to make it work well.
I give it it's second star, because it should work (chemically speaking). If you don't mind the expense and the waste of product, then this should work to help your gums get healthier.