So far it is a fantastic game, while you can only go to level 8 it gives you some basics and shows you what you can get to in the full game, subclass included. The online is nearly lag-less, though loading times are a bit long depending on what youre trying to enter.
The guns feel great, they're all responsive, though there's only about three primary weapon classes at the time. I'm not sure if they'll input more, hopefully i suppose.
The only real problem is the character customization, and the fact that it's honestly pretty shallow. You select from >10 or so heads, hairstyles and facepaint. There are 3 different races to choose from but even with that the character builder is pretty basic.
The storyline isn't too hard to follow either, the voice acting is great and subtitles stay their welcome and dont take up too much screen, however the audio on the voices themselves can be a bit low or get drowned out by music.
All in all, it's fucking fun. Even with a glitch here or there, the game is responsive and fast, and never feels too difficult for whatever level you are. (hopefully the full game's difficulty curve will be good.) The beta alone has certainly made me want to buy the full game, so I'd say mision accomplished Bungie.