I was looking for the thickest strings in the store and these were them. I used them on a 6-string guitar on various tunings (even crazy ones like a double-drop E) and they perform well. Sound is really good, and hasn't gotten worse even after a reasonable amount of playing, the feel is great when having a relative high tuning, as they get quite tight, being so thick (basic physics, duh).
What I am disappointed of was that one of the middle-strings (can remember which one right now) broke on my first week of playing. Well, it was a 7-string set so no problem, but that was still weird. I'd had much preferred to use the exact string I had in the first place, the substitutive is a bit too thick for it's place (3rd or 4th string).