What I use it for: guitar soloing, because it has an amazing full tone, not making harsh, treble-y sounds and rock bass guitar, because it goes fast AND it has a very full tone, giving me the fundamenals of the bass sound.
What I don't use it for: greek folk guitar, because it hits upon the wood and makes a big, ugly noise, and chord strumming because it sticks a little bit along the way.
All in all a very good tone, very good durability. The only thing that I don't like very much is that it sometimes slips through my hand, as, since it is a fat pick, I can't have a very good grip on it. But that's just me, because I've difficulties with pick holding all of my life.