I have been using it for the past 3 years and it is simply the best option available. It takes a bit of time to understand its various features, but once you have the hang of it, then you can sit back and relax.
Further, in the past 3 years, there was only once, when they had a small issue with file uploads which was resolved within a few hours by Paul and his team. Unlike other repricer like Appeagle which was down multiple times last year, ChannelMAX can be relied upon.
Further, the prices they offer are most competitive.