If you use shaving cream it disolves the moisture bar more quickly. I don't use shaving cream with it until the moisture bar starts wearing down. If my skin is getting sensitive before the razor is dull then I use it
I have semi-sensitive skin. I tried both with and without shaving gel. It worked ok with out but my legs are on the dryer side and it seems to pull at my skin more than I prefer. I used both for an extra dose of moisturizer and loved the outcome! Beware tho - don't leave it in the shower if other people use your shower because if it gets wet with out being used it doesn't last as long.
Though the bars provided just the right amount of moisture for a close shave, every time after, I needed to use some other shaving cream or soap along with the bars. This made spending the extra money on the moisture bars seem a lot less worthwhile.