Working great for me, fit is an improvement over my last set (APP1s). No issues with them staying in my ears. Did some yard work, chores around the house, etc. - no problems. So, pretty happy with it.
ANC hasn't been "great" for me. I've been daily driving Sony in-ear XM5's waiting on these APP3's to eventually come out after trying APP2's from a friend (gross I know) and still had the fitment issues. The XM5's seem notably better in ANC.
I still think week 1 or 2 when the APP1s were released before they nerfed ANC for being too harsh for some was the best ANC there ever was. I can hear my fingers snap, typing, etc. with my earbuds in. It's just not a great ANC experience for me comparatively, although it does work well enough. I will have to try different fitments out with the ranges of tips provided to see if any of them help. I'm on my 3rd set today (used the ones that came out the box, Medium, now Smalls trying to get into a smugger fit I think).
As far as sound, it's good too. Definetly more bass, but I'm not sure it's as "rich" as it could be. An improvement over my APP1s for sure, APP2's maybe better? It's been a year since I've tried those though so can't say much. Compared to XM5's, these have more bass - but again the APP3's just lacking...richness in the audio. It's like...a lull in a frequency that's just not as prominent as it should be. I don't think it's awful, though. Not by any means. Just different.
Give us EQ and it'll be dialed in to everyone's preference beyond the default I think.