If you are looking for ranking service for your Amazon US product then i will not able to help you good. But am helping others to rank their keyword on amazon.uk, amazon.es, amazon.du, amazon.it for sure. I will just take about 7-10 days to rank your keyword to amazon first page.
Ranking a keyword very helpful to make more sales. Some people say it is risky to rank keyword on amazon because they will penalize your product. Yes it if you dealing with black hat SEO methods. We stay far way from black hat methods but we have real visitor to give you page impression.
Lets get started with your product and get it ranked quickly.