These strings are a little thicker in bottom for that extra "oomph" needed especially when doing clean sounding things. Since the wound strings are some kind of hybrid between roundwound/flatwound they are easy on the fingers, and no finger noise can be heard as much as on roundwounds especially when overdriven.
Suits me best to single coiled passive guitars such as strats, teles since the bottom strings are more subued in the high end sparkle department.
For getting that Eric Johnson sound you have to look at other parts of your set up, in order to get it. Strings are sort of the least part in that equation.
But they stay in tune, and you can whammy with them quite hard without going out of tune. You may have to reset, readjust your floating tremolo since bass strings have slightly thicker gauge. But once done, you're good to go. The lifetime is about the same as other GHS strings, D'addarios or whatever.