I've never tried one of those, but we have a Dewalt 20v chainsaw with a 12" bar. It works great for clearing small trees and deadfall. My wife loves the thing because its light and handy for her and there is no fighting with internal combustion like on the bigger saws we have.
Battery powered tools have come a very long way and now often straight up out perform their corded counterparts, but usually at a higher price. $59 for yours is a steal.
Mark