i have one ,a stihl alot like a chainsaw,has a belt drive for the blade,it's real easy to use,but does have a compression release.it does throw alot of dust,so i usually have a hose near by and keep the crete wet,if it's new crete you will need a blade for green crete,if it's old and cured you will need a blade for that,fresh green crete cuts pretty easy but that cured stuff can be stubborn. i'll agree with the eye protection and raincoat,i will also suggest ear plugs as they are somewhat loud.