Hokay, it's been a bit of a while so I'm a little late to the feedback party, but January was gigless, and I wanted to give these strings a proper run out before reporting back.
They replaced a set of EXLs, and immediately the feel is different - the winding is noticeably finer, and acoustically there's less finger noise, and if you're susceptible to rough strings, you'll find them easier under the finger.
No silks, which is great - I've always found silk/cotton wrapping to be a problem looking to happen, depending on the design of your bridge.
The tension feels similar to the D'Addarios I've had before i.e. pretty high, which is something I like, but of course YMMV. They seem well balanced as a set, no issues with string to string variance.
They're a 'big' sounding string - a bit of a vague generic description, I know, but for me that's a good word for them: they upped the output of the bass, and are warmly punchy and meaty, but without being harsh in the mids. Highs are good for nickel - obviously not as zingy as steels, but they've a good range of tone. I play 80% pick, 15% fingers and 5% slap, and they sounded very good with pick and fingers, possibly not so much for slap.
Tuning stablility, which was mentioned in the blurb, is very good - I put them on, got them up to pitch, gave them a quick stretch (which I always do - don't we all?) and retuned, and they've stayed there for three weeks or so, through hours of home playing and a hot, thrashy (but not Thrash ) gig.
They don't sound to have dropped off in tone very much, either, although I'll be monitoring this longer term and report back.
They feel like a premium string, so I'd expect them to be priced a little above the normal EXLs, and if they're ballpark with the usual suspects (though not in with the coated ones) they should sell well.
A big thanks to the good folk at D'Addario for letting me play with their new babies: it's been a lot of fun.