One little quibble I have is that my unit is definitely noisier than my OG PS5. That was completely silent from day one, so quiet in fact that I thought the fan was broken when I first got it. The Pro is audible, not massivley so and way, way quieter than my PC under load.
But the difference it has made to the few games I have tried is amazing to be honest. Way better than I thought it would be. But you really have to see the games in motion to see, and understand the difference. Controls feel more responsive, frameerate is really stable, visuals are crisp, not seen much in the way of artifacts from PSSR yet, some shimmering on panning in Veilguard.
Load times seem a little quicker too, but I haven't actually timed them so that could just be in my head.