Biggest thing I can say it to check them out here at Big Mikes (now "future.oi"). I have no experience with DTA, but I know most teachers/rooms are not very reproducible (to say it kindly).

The fact is that everybody will have their critics. But look for openness and that they actually trade. I can make thousands of systems that work on back-testing, paper and simulators.

There are a few good "systems" out there, but the most important part is the psychology. "Psychology" doesn't sell well, so you don't here much hype about it. But the reality is that if you train the psychology right, then you can successfully trade just about any system. If you can't do the psychology right, then no system will be successful (and everybody thinks they will be the one who has the right psychology to start off with.)

A good starting point on the psychology is Mark Douglas' Trading in the Zone (you can get the book or audio). But apply what you learn diligently and don't think that your feelings will change the market. Indicators give a probability on what may happen next. One's PandL is not an indicator (though it appears to be the most popular). Therefore trading depending on your PandL or how you feel is ludicrous (but we have all done it.).
(PS I have watched CFRN.net for years and they are open, honest and keep good records. But it may not be your style)