You want to avoid the products that promise to eliminate the problem in one day, week or even a month. You want to avoid the products that only mask the symptoms, rather than providing a long term solution.
That is why I find the Sonus Complete Review to be such a major source of information and confidence. I know that it was developed and put together by doctors, so it definitely has their best interests at heart.
Tinnitus is not a simple problem that can be cured. It is not something that you should waste your time and money on, and it is certainly not something that should be swept under the rug.