I did one there. It was an excellent rotation! I told them I needed to be published, and they gave me 2 opportunities (with plenty of assistance from attendings) in one month! 1 of the 2 turned out, which I guess isn't bad. They will be asking you derm related knowledge though, and you will also have to make a brief presentation in front of the dept, so study before and during the rotation. (they told us to use Lookingbill & Marks). have fun!