This topic comes up alot, but if no one gives bad reviews then only good ones can be found. There are a lot of people who look for product reviews before making a purchase (me included) and if someone reads a post about how an AMS part cost 1/2 the price of their competition with no complaints about quality control or failed parts then we would be helping AMS. I know when using google to search for anything Z related that TT.net comes up quite a bit.
I'm willing to bet that after time when you do a google search for AMS reviews, if TT.net can keep up with everything that AMS does that there will be plenty of bad rep for AMS!
If we kept our mouths shut, no one would know of what AMS does and they would only grow as a company!