I like the soft feeling of the string especially right after the rackets are strung (I switched from Babolat RPM). This string also generates a lot of spin. You can hear the string moves when you hit balls. The price is also good, especially when you purchase more than 3 strings.
However, the string suddenly loses the elasticity after 6-hr play, resulting in stiffer feeling. I usually break my strings after 6-10 hours of playing, so stiffening is not a major issue for me though.
Overall, I will give this string 4 stars.
Black widow has tremendous bite and seems to provide incredible spin whether attempting top or under spin. It is a poly string so the life of the string can be short particularly if you are a heavy hitter. This is my string of choice however, I wish I strung my own rackets...