The device the reviewer is referring to is this one.
Dental health is a precious thing and it is not something that we should trifle with. Expensive treatments are not fun, both financially and with regards to the pain factor.
Dental work generally does not last forever either. At some point it may need to be 'redone' adding to the cost, time and suffering.
Prevention on the other hand, may be able to free you from some of that burden. Would it be worth it to save thousands on your dental health over the next decade?
I think it would. You can tell me if I'm wrong about that.
Read this now and let me know what you think.