I am using this string on my 7 String guitar. Basically I buy a 0.09 String set, then I add this string to the set as a 7. string. It sounds really nice and it has a long life. It stays fresh even after 2-3 weeks. The feeling of the string is so smooth, sliding and bending are easy. I can recommend that for everyone.
Positive: The long life, good package and fresh strings always. It shines even after 2-3 weeks and the feeling is still new.
Negative: In my opinion, it is a little bit expensive for a single string. There are Thomann electric guitar string sets, which are real deal for the price, even cheaper than this. But if you are looking for some string which is like 0.56, than probably you will pay something like this.