Owner of AirPods 2. I wanted an upgrade mainly because at the gym or outside I had to have the music very loud to "cancel out" external noises, which is bad for the ears. I also wanted a better microphone since no one could hear me on the 2s.

I was between AirPods Pro 2 (APP2 as some call them) and these here. Due to the fact that with a trial of the APP1 the silicone bothered my ear, I decided to get the 4s.

In terms of sound, the improvement from the AirPods 2 is huge. Clearer sound, louder, but the bass is weak. Nevertheless, at a lower volume, the sound is better compared to the 2s.

As for the fit in the ears, they are not as good as the excellent AirPods 2 for me. At first, they sit well, but after a little while, one earbud comes out of the ear.

Now, the Active Noise Cancellation (ANC). It's definitely not magical. It's just okay. For me, it's noise reduction. You hear everything around you, just at a lower volume. Even the sound a waterproof jacket makes when you wear it and move. You just hear it quieter. With continuous sounds (e.g., a hood fan), it is definitely more effective.
The video here at 3:30 gives an accurate representation of how ANC works: https://m.youtube.com/watch?v=hABUJMdKuuI
Many fans will say, but it doesn't have silicone, so it's logical that it doesn't work wonders. Yes, okay, we are talking about how much it cancels noise.

In general, if you want a noticeable upgrade from the AirPods 2, you will find it in the 4s.

Minus one star because the ANC is just active noise reduction and for the fit in the ears.

Compared to the 3 I had, they have a fuller and clearer sound... Design-wise, they are almost the same, the speakers in the earbuds have changed a bit and it seems to me that they fit better in the ear... Okay, the ANC is amazing... They charge even with the Apple Watch charger... Overall, they are fantastic, but to be honest, 200 euros is a bit pricey... But if you're thinking of getting them, go ahead with your eyes closed...

Perfect! The active noise cancellation is epic, the shape is very good compared to the clunky shape of the AirPods 3, it charges with the Apple Watch wireless charger and of course when you talk it lowers tremendously! And the case is smaller than the AirPods 3

I am very impressed, such a nice sound, not at all annoying in the ears!! The microphone makes it feel like you are in a closed room, you can't hear anything from the street! I respond by nodding my head, what are you saying now, I talk somewhere and the sound lowers until I finish and then it continues, unbelievable.. the only thing that bothered me is that it doesn't lower from the headphones like the AirPods 2 Pro, but it's a small flaw, I don't even see it compared to the others it provides.. with closed eyes, just get it, don't worry about anything