Got my LS60s + 2x KC62 set up this weekend. No measurements yet and the positions of things aren't final, we're still unpacking moving boxes, so things may improve from here. Even in a less than ideal setup (speakers 6' apart, LP 9' away) things sound great. They make my 80s-era B&W DM2000s sound like rocks banging together. The importance of the KEFs' even dispersion is obvious from the first minutes. Clean, lifelike, surprisingly deep bass - the reviews match my experience so far. Good recordings sound good, bad ones sound bad, etc.
Even 90 degrees off-axis, (in the kitchen, no less) the sound isn't good per se, but it's surprisingly good. You do get some imaging even standing right in front of one speaker or the other (or even outside the pair), and and at the MLP it's quite good even with bad placement.
Adding the subs is surprisingly impactful and once you mess with the EQ a bit, everything sounds that much better with nulls getting filled in. We were watching that new Netflix live-action One Piece and the cannonfire had all the oomph I cared for it to have at 9PM with neighbors on either side...
As most of the reviews say, setup is really painless. Pop them out of the boxes, plug 'em in, and fire up the app, it's basically that simple. I was pessimistic about the wireless transmitters for the subs connecting properly, but they connected pretty right away with none of the fooling around I'd mentally prepared for.
I think these also really set the bar for compactness and convenience. Not to lean into stereotypes too much, but my wife commented on the sound quality (a first) and hasn't complained about their appearance yet (also a first.) I guess you really can have it all.
Wireless actives really are "the future", (well, the present... and recent past... Sonos has been doing well with them for many years now) and now that we're reaching higher heights of hi-fi with these all-in-one streaming """lifestyle""" speakers, it's harder to see the appeal in separates.
Of course I am aware of and somewhat agree with the arguments for them over actives, (I own 4 or 5 amps myself, still) but it's really nice to get a killer system set up in 5 minutes with no extraneous electronics you need to cram into a cabinet somewhere. I'd say any audiophile manufacturer that aspires to relevance should put streaming actives on their roadmap if they aren't already - my guess is that the market for separates is going to shrink even further over time, just so long as reliability remains in the same ballpark as separates.
Edit: I didn't run the ethernet cord to the left / secondary speaker, I have solid wifi coverage (TP Link Deco AX4300) and zero trouble so far. So the only wires I'm using are a power cord per speaker and an optical cable to the main speaker.