+1 on the thread mentioned above. I've done it many times and it works like an absolute charm. However, the small things are very, very important to have success with the BierMuncher bottle filler. The only thing that can really go wrong is excessive foam, so your strategy is to make sure that doesn't happen and that means having everything involved in the process as cold as possible. So, your beer should be as cold as possible, and your bottles should be as cold as possible--I freeze mine. Even a few degrees difference in temperature increases foaming exponentially. But the process can work really, really great if you are careful. I would also suggest over-carbing by a few psi to compensate for losing a bit of carbonation in the transfer, but I am not sure if that is really necessary.