I really like it. It makes great lather, has a nice feel in the shower and leaves my skin feeling really nice after the shower. I'm not sure about the chemistry of why it's good, I just know that I like it. Hubby loves beer soap and goes through my stash of it almost faster than I can make it.
As far as smell goes, I find that it smells awful at first. When you add the lye to the beer, it's pretty gross. But it completely fades after the cure. I don't notice any beer smell left in the cured bars. I've never made an unscented beer soap, so I don't know if it would smell any different there. Some say there is a slight nuttiness to the smell after a cure. I'm sure it might depend on the kind of beer you use too. I've been using mostly cheap beer. A couple of times I used coors light and lately it's been all miller high life. As an experiment, I might use a good strong stout to see if there is any change.