Yes John, I have been able to make consistent profits with EA Studio over time.
With any generation software there will ALWAYS be a portion of poor quality strategies as that is just the nature of the beast, however there are certainly good strategies in there. That is where effective robustness testing and experience comes in.
EA studio is just like any tool. It is only a bad workman that blames his tools (I am not calling you a bad workman btw but the saying definitely applies).
There is a learning curve and like anything the more you practice and more experience you get trading with expert advisors the better your results will become.
Will EA studio allow a complete novice to click a few buttons and trade profitably, highly unlikely. But that is a totally unrealistic expectation so that in the first place to start with.
HOWEVER EA Studio my opinion is an absolutely excellent tool at what it does (And in my experience the absolute best generator out there for both beginners and more advanced users alike). Can I and do I code my own more advanced strategies yes, but most of my portfolios are created using EA studio.
EA Studio will however massively speed up entry into the market, save an absolute tonne of time and effort and once proficient will effectively allow experienced users to create robust portfolios in the most efficient and easy way that I know of.
Trading is just like any other skill. Practice and experience are required but the right tools will help that streamline that journey to competence and EA studio in my experience is my favourite and in my opinion the best.