I'm looking to try some better body soaps and I have a couple questions. I've used Irish Spring and all the grocery store brands, and Dove is currently my favorite. My question is: do the nice ones last longer? I can barely get through a week with a bar of Dove, and I don't feel like I'm being too liberal with it. Also, besides scent, what advantage do the nice soap bars provide? Obviously YMMV, but I would appreciate some input.