Beta 1 as surprsingly stable for me, but most of the games I had wouldn't play sound during the actual game. Beta 2 was 100% successful during my trip to NYC camera wise - but had facetime disabled. I did have an issue where safari would clear it's cache routinely. That was fixed in beta 3, but beta 3 - 5 (for me) had issues where apps would crash upon launch, but would run after second launch.
Overall it was just small things here and there, plus one bug that still exists in the GM. It's a small one and a force quit fixes it for the next launch. By far, beta 5 was the best for me battery wise. They did take away a cool keyboard disappearing animation in a mid beta, so I guess that was just a bug. Still looked cool.
Now the GM. I am bit surprised about the build number. All throughout the beta it was 9A5xxxx. Now they took away the 5, making the build number smaller than the betas. Oh well.
What was the question???