There' s probably nothing drastically wrong with them, but I' ve been shooting strings that I make, and I hate to brag, but they are superior to anything you that comes packaged with a bow. I' m spoiled and now the little things bother me. The servings are less then the best on the Diamond strings. I like the string supplied with the Merlin a bit better, but I still won' t use it.
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I guess I' ve always been one of those " less is better" people. Or maybe I should say, " more is not always better" . Let me give you an example. I own a Martin that has many 10' s of thousands of shots on it. The simple limb rocker system that Martin uses, is bullet proof. A few hundred thousand shots later and I' m confident that this system will not fail. The limbs or riser may break, but the rockers will not wear and it' s position in the riser should remain the same. When I look at bows, that have rubber pads and set-screw all over the place, I get a little nervous about how it will hold up after many thousands of shots. I know rubber ages and gets brittle. Screw also have a tendancy to get loose and fall out (my friend lost one from his Merlin in the first month that he owned it). Little things that may or may not affect accuracy or noise level, but are annoying all the same.