In addition to all the other positives posted here, I'm totally blown away by the versatility of my 519! There are as many sounds in that single PUP, 2 band EQ bass as there were in anything I've ever played, including my 55-94s,
I used to take it as a backup bass, but anymore, it's my main player, because in addition to the light weight, sleek neck, and overall playability, it's sounded great in any venue I've played in, indoors or out! Every once in a while I find myself in a setting I can't get the 55-94s dialed into on the fly (same experience with my former Sadowsky). The Zon has never failed to deliver (my Modulus also excels at this).
I used to take it as a backup bass, but anymore, it's my main player, because in addition to the light weight, sleek neck, and overall playability, it's sounded great in any venue I've played in, indoors or out! Every once in a while I find myself in a setting I can't get the 55-94s dialed into on the fly (same experience with my former Sadowsky). The Zon has never failed to deliver (my Modulus also excels at this).

You can also go to my website and check out all the "specs" on this baby...