While I understand that you're excited about new features and bug fixes you should hold your horses and wait until upstream deems their software ready (by issuing a release).
Read the open letter here: https://do-not-ship.it/
For more experimental stuff there is also the experimental (or octarine) suite.
One word of warning:
You should know what you're doing when altering your apt sources. Otherwise you can end up with a Frankendebian -> https://wiki.debian.org/DontBreakDebian