pvaudio, well, i warned you about what was going to happen and also that after 3-4 hours you would experience a pretty steep performance drop - but it is really an option for people who can and want to restring after every second hitting session. there are a lot of better strings out there, the question is if it is worth to pay the higher price for it. i just had another rather similar experience with pro's pro strings, namely the blackout as mains and the 1.30 hi-tec multifibre as crosses. the hi-tec plays very very similar to my beloved mcs and the blackout is basically a black code clone. put them together and you really have an absolutely cheap combo (at last at european prices) that plays superbly for at least up to five hours (until the crosses break!). in europe this combo would be less than 2 euros per stringjob! again i do have to mention that there are quite a few better, even much better playing combos out there, but at three-four times the price, so, if someone is stringing for himself, it is a legitimate question you ask yourself - should i hit the "third session" with the "old" premium stringjob or should i just take every third time a freshly strung "cheapo" to the court.