Great strings, bring a ton of life to my Bongo 5HH. I was using some Elixir Nanoweb Nickels... and for the price I paid felt obligated to keep them on longer. Not sure how long they were on, maybe 9 months. Prosteels have brought back the zing, aggression, clarity. Even out of the package the Elixirs were a tad scooped & not that aggressive at the high end as you would expect for nickels. If these things have a good amount of life I may stick with them. Not as grabby as the Rotosounds. I like Dean Markley Helix SS but they dont fit that well on the B string on a 34" scale non-body thru. Cobalts are great but twice the price as the Prosteels. My next strings to try are Elixir Nanoweb SS. It will be interesting to see life vs these Also have DR highbeams on the docket Prosteels have a big edge to start !