I am selling products on Amazon in the UK and US markets then started using logicsale about six months ago. At first, I was suspicious. The prices are a bit higher than other softwares but it's worth it!
What I like the most is that I have a direct person to contact whom I can call any time I have a problem. This is the support I need as a professional seller.
The software is easy to handle, it reprices faster than others I have used and adds new features regularly.