I've had the Penrose since it was released and have been mostly happy with them. I have no complaints about their sound quality, and did a lot of A/B testing and comparison with the Sony Pulse 3D, Arctis 7 and HyperX Cloud wireless. For reference, my daily drivers are ZMF Verite and HD650's at my computer and Momentum Wireless 3.0's for travel.
I've only had time to use it for one night, but so far it's been a significant upgrade from the Penrose. The sound quality seems on par though the signature seems to have a slightly different tune - totally fine because the absolute best thing about the Penrose was its sound quality. I feel like the immersive pre-set EQ seems more similar to the stock Penrose signature, but maybe I'm wrong. Either way, the clarity/dynamics seem closer to the full desktop headsets I use, which subjectively feels like the most noticeable improvement for me in terms of sound.
While I've always loved the Penrose sound, I think the Maxwell completely improves in nearly every other aspect. As promised, the new dongle connection range is ENORMOUS! I actually can't seem to drop it walking anywhere in my house until I go into my son's closet on the opposite end of the house on the second floor and close the door. That's just incredible. I would get slight static "crackle" even sitting with 10 feet of the Penrose dongle, and the headphones would normally start disconnecting once I move out of range into our kitchen. Absolutely no problem with the Maxwell.
I was worried about the increased weight, but I used it for about 2 or 3 hours last night with no issues - I actually find them slightly more comfortable than the Penrose! The suspension headstrap distributes the weight well enough and the pads don't have as much clamping force as the Penrose, which is usually what used to start bothering me after an hour or two of play in the past. The battery life I'm sure is great, though admittedly I've never had issues with that with the Penrose either (I unfortunately don't find time to play hours and hours of games anymore now that I have kids, haha).
I can also confirm that they fit quite well with the PSVR2. I can understand how this fit will be subjective though, as the larger (rounder) earcups barely fit with the way I wear my PSVR2 - depending on people's head shapes and how they wear the halo-style strap, there may not be enough space for the Maxwell, whereas the Penrose was much easier to nestle onto my ears. Thankfully it works just fine for my personal use, and even with the heavier weight, I find this more comfortable than the Penrose due to the reduced clamping pressure. I do feel the weight after a while, but it hasn't been bad - played about 2 hours of GT7 and Horizon with no issues.
My main pet peeve is what I mentioned earlier in the thread - I could always leave the Penrose USB dongle plugged in, and the PS5 would only "detect" it and switch to it when I powered on my headphones. For some reason, the PS5 always detects my Maxwell dongle regardless of whether the headphones are powered on - I've tried all USB ports and even switched between PS5 and PC mode, with no changes. I don't understand why others don't experience this, and I hope there's a way I can fix this.
Lastly about volume - something odd is that I notice that when I kept trying out different USB ports and re-connected the headphones, the audio volume would occasionally seem to get "capped" to a low level - still audible but not as loud as I'd prefer. Generally just power cycling the headphones rectified this and it wouldn't happen again unless I switched USB ports again. Suffice to say I have no issues with volume level now and I don't have it capped.
