BT 5 R2 is beta isn't it? IF that is the case, I would stick with the stable release.
But, as I've read, BT is built on Ubuntu and if you have a good stable Ubuntu release, why not install le programs needed like Airocrack and all. This is what I have almost heard.
Honestly, I think BT is good for the community. It provides everything needed for a seasoned pentester, or n00b. It's the beta I don't trust, drivers among other stuff isn't working/reliable enough for a full install. Live CD is perfect for this kinda stuff.