I have been using Market Samurai and found the results to be very reliable. I have found the same opinion from many other established marketers too.

Even for those on a tight budget, if after the trial period you do not renew, you still get to use the basic keyword research tool, which is the main tool we need anyway.

I haven't used Market Samurai...I do have traffic Travis...It's worked out pretty well, i bought the professional version a few months ago...I like it!

Market Samurai is the best!