These are hands down my favorite guitar strings ever!
They can be a bit harsh for your fingers if you're used to a smaller string gauge, or if you're a beginner, like they were for me, when I first tried them.
I don't know if I'm imagining it, but IMO these strings give you slightly more bottom-end to your guitar sound. Maybe it has something to do with the pickups reacting differently to the bigger string gauge...?
They are sturdy, and do not break easily, if you restring your guitar properly (one set lasted me for many months because i was lazy, and didn't feel like changing them :)). I suggest you still change the strings once every one or two months, since after some time, and especially if you play your guitar daily like I do, they start to sound flat. A new set of strings can make the guitar sound so much better.
I would recommend these for anyone. Personally I play blues, rock and some jazz, and these strings suit those styles just fine. These strings are totally worth the price.