Surprised that there hasn't been a topic on this yet. I spent a good amount of time playing the beta the past day and I have to say that I'm liking it better than U2. While the beta can run very unstable, it also runs very smoothly when things are in working order. Naughty Dog has also been very responsive to the user feedback and have updated things a few times since the betas release less than 24hours ago.
So anyone else out there give it a go yet?