I've tried take classes in the both methods. In this time I realized that it doesn't depend on method that I used, but how the professor is using it. I mean, there is good and bad professors in the both methods. If you are learning with a good professor in a language institute and I'm learning in a private class with a bad professor... that's where it depends on. HOWEVER, I prefer private classes, then if I need to explore others speakers, sharing, etc, I schedule with friends and do it. 

I appreciate your English and I tell you, I'm going to use this way from now... I really liked!!

Maybe it tell us that the good friends sometimes don't come by the great things that they can offer to us, instead they come in small things... (which for me are greatest things) like hugs, smiles, talking, some times a "How are you?" or " Do you need something?" ... or something that makes you better when you are in needing of that! :)