Fantastic. I've to say... this has been the worst Apple notebook I've owned... but after MacOS Monterey I could immediately tell the difference. The computer is simply faster, snappier between apps (greatly), and maximizing and minimizing app tabs is smoother (much more)... it is considerably less hot now, much much cooler, asking the same tasks from last week under BigSur; the fans are working much more intelligently, and the sound has never bothered me. Video playing is not lagging anymore while in mission control (which was always happening)... the only thing that still performs poorly, and even worse, is battery... at almost 450 cycles, while on a video call, I can have just one hour of battery, even applying the new Low Power Mode.
Other than that... the battery behaves decently (when not on video calls)... I'm used to this battery already I guess... (9am to 3pm is the longest I get under constant use)... we already know they couldn't do much with Intel draining it all up.
Things have also been updated for Intel-based Macs in case you missed it... the only real features we're not getting with Monterey are a few things on FaceTime and uninterrupted and offline dictation. Other than that, it's sharing all other features with M1 Macs... the most important and useful being Live Text.
I don't say this lightly... I feel I have a new MacBook Pro with Monterey.