Seriously...I've seen just about every single band that plays at festivals these days, LITERALLY, and I go to MC for the atmosphere, relaxation, swimming in the river with all the naked chicks and camping and drinking with friends. The concerts tend to take a backseat to everything else. Plus, a 7 day ticket for like 130 euros? How awesome is that?
It's organized extremely well, there are hot and cold showers, literally about a hundred toilets cleaned twice daily, plenty of food, plenty of activities around Tolmin, REAL CEVAPCICI, a side stage for all the up-and-coming bands (which you should try to get on Azal!), a pretty good metal market, and really nice people. It's kind of a tradition for me to go; I've gone to every single one since the first. Highly recommended if you want to have a good time overall.