I know these strings have been praised here before, but I am really surprised by how good they actually are. I bought a set of Roto 66's for my '12 USA Deluxe Jazz, and fully expected them to sound better than the default Super 7250 strings the bass came with. I would usually expect fresh Roto's to sound amazing on a jazz bass, and I normally don't mind the rougher feel and extra noise associated with them, I have them on a few of my other basses and normally really like everything about them. But when I put them on my Jazz, I was surprised to find that they sounded a lot less focussed and a lot more clunky than the Fender strings. The Fender's have a very mid-heavy, growly tone, but not much noise or clunk, even with the treble boosted on the bass. I know I'm beginning to sound like an advert but I'm just surprised by the difference these strings make, I'm definitely buying them again. Plus they're cheaper than any other strings that I would normally buy. (I usually use Hi Beams, Sadowsky Blue's, Dean Markley's and Roto 66's). Does anyone know how / where these are made? Are they specifically made for / by Fender or are they similar to anything else out there?