I've just recently finished a front-end, online one. As an experience it was awesome, I had contact not only with my mentor (great guy), but also with a lot of like-minded people. As a finishing touch we had a week of classes with an HR specialist to polish up our portfolio, CVs and to guide is through recruitment process. I can't really say much, as I'm still looking for a job, but I have a good feeling 'bout it all :)