They have in-depth knowledge of PPC. I love the PPC Den; I may have watched almost all of their videos. The information and advice they provide are easy to understand and then put into practice.

AdBadger is an amazing tool for automatic bids and keyword optimization, and the best (of what I've seen) Amazon PPC analytics tool with powerful features and benefits. I and my team save enormous amounts of hours every day and at the same time, the ACOS is down and sales are up. Highly recommended.