Watch the video from "MobileTechVideos" on YouTube - Follow it EXACTLY and you're fine - I did and it worked flawlessly.... the flashing part. The Camera was hit or miss for me and that's ultimately why I flashed back.
The ROM is definitely way better than most 2.2 ROMs and has a really different feel - it seems infinitely customizable.
As for the ROM itself and those saying "I'll wait" - Why? You're never gonna get the convenience of flashing 2.3 the same way you flash 2.2; it's a different architecture that requires different installation methods. Flashing to 2.3 is easy and if you don't like it, all you have to do is ODIN back to stock and reflash whatever you want.
You cannot perma brick your phone trying this! I say "What are you scared of?" It's been "beta" for 6 weeks now and have had 10 revisions, getting better each time; They have a method for bug reporting so the more people they have using the beta, the more people can report any bugs that do exist - The more people using the beta, the FASTER we get to seeing a final 2.3 ROM.
Seriously, download it now and FLASH - There is NO reason no to try it.