Thick and syrupy as it gets IMO. I'm mostly a ceramic guy, but if ceramics didn't exist I'd probably have a TZ in most of my bridges.
I like the JB also, but the TZ has always pleased me a bit more and sits better with most of my other gear choices..
I'd like to try a Pegasus someday too, along with the Breed.
I liked the Tone Zone a lot in my Charvel So Cal. It's very vocal sounding, and more versatile than I thought it would be. I ran it with just a volume (no tone) and like that didn't find it too dark or muddy.
I'm putting it in the bridge position of my squier affinity strat. It does seem a Little thin and definitely bright. I have a fast track 1 in the neck and a super distortion for strat placed directly against the (soon to be) tone zone for a "middle" pickup. I'm going to be using the guitar to play alot of punk rock and some ska. Thanks for the feedback guys.