I have gone through the cheap polys (go dead after not being played with for a few days, not to mention tension loss), synthetic guts (I just broke psg duraflex 16 in 45 minutes of straight hitting). I have not used kevlar hybrids because I am concerned about my arm and have been told they are dead. I was looking at Gamma Marathon as a possibility. Will this go dead after not being used for a few days? Will it last? Is is worth $8? Thanks.