what do you expect from 2.50$ quick concerte= shit, do expect thing great from then, to make something decent you would less spend more then that to make something, depending pn how big, your going spend long time and pouring that stuff in there and it wont be very great, on less your experience, what trying to say is, that to pour concrete take experince to make skate able, and having some amture to tell how to do it, is a whole diffrent thing, it made be a waste of time.