The first thing that strikes you about the Halo 3 beta is just how polished it feels. It's not like the beta is a hint of things to come and that you have to brush aside bugs, long loading times, and a number of other issues to enjoy the game--the beta runs at a solid frame rate, is graphically impressive, and feels well on its way to being the code that fans have every right to expect from the finished game. The player models in the beta are the same blue and red Master Chief variants that will be familiar to Halo players, albeit with new bells and whistles. The models themselves now feature rag-doll physics, meaning that dead bodies will bend and buckle according to the environment around them. When you're alive and you look down, you can now see your legs.
Nice to see Bungie have polished up their Beta and have gotten it to a stage where it even seems complete, thats great news for Halo fans regarding the stability of the game and lack of bugs that would ship with the finished version.