I have been using Tactical Arbitrage for aboaut 18 months. Since I am not a big fan of Retail Arbitrage this is my only source of products to sell. With it I have met my personal Amazon goals.The product itself is very stable and works great. Alex (Founder) is always looking for ways to improve. He is always on Facebook and will gladly answer questions. He keeps everyone updated on coming improvements. They are super responsive if there is a rear problem. Absolutely the best Online Arbitrage software not to mention a very well run company.