From gaf.
Have been playing this whole last evening. It works almost flawlessly. Ps5 is wired, and have a TP-link Deco M9 mesh through the house. 3 units, all wired.
Most single players run without a hitch. Don't notice any lag. Spidey 2 worked fine. As did Horizon FW. I saw that vid on Twitter from the Tom's Guide guy, Nick Pino. Works faultless on my end. Something is up with that. The 3-loud-Ps5-Slim-in-a-small-cabinet is probably his nephew eh? I also tried D4, which worked very well. Until i tried a World Boss that is. Once its started the streaming side still worked, but the server side was laggy. That could be a coincidence, or it could be d4 network code and the streaming getting in each others way. I don't know. Will have to test more.
The biggest win for me though, other than that the device just works, is that it is very comfortable. Most handhelds give me numb pinky and ring finger after a while. The Portal did not.