Two uses for the brush for me:
1. At home, I wet the brush w/ hot water, add about a teaspoon of HS and 1/2 teaspoon of gylcerine, then apply to the dome w/ vigorous scrubbing action and a little quick dip in running hot water. The stuff whips up into a nice lather for around the chin mitten too. Then, shave #1, rinse, some Shave Secret and lather again, w/o more HS and then the second pass--Baby Butt, everytime.
2. On the road, w/ airlines restricting the liquids and jells, I pack a disk of shaving soap and the brush-no TSA restrictions there. I use a glass or cup in the hotel room to whip up a nice lather--and basically the same, two passes. I like the fact that I save my liquid "quota" in the one quart plastic bag for some after shave balm and some sunscreen.
I really like the feel of the brush on the dome--nice way to start the day.