dont know if this is really a FAIR question, as most people who are successful can not base their success on one tool...

Market Samurai without a DOUBT is a HUGE help got market research / content research / etc etc.

This may sound a bit trite, but none of my success comes from Market Samurai or any other tool ... it comes from taking action . And knowing my market helps as well.

With that out of the way, MS is a good tool for finding and evaluating markets. But it still takes testing to verify those markets, especially if it is one you aren't familiar with.

Marvin

It depends on 'you'

I use keyword tracer,adword tool and market samurai to get one good keyword, so i cannot rely on just the market samurai to get one good keyword.