I am considering putting some kind of play surface down and wanted some advice. I already have a woodchipped (soil underneath) area that houses my climbing frame, and I currently have a stone filled area approx 9ft x 16ft, some of which is earth underneath a little concrete. I had thought about putting down some of that interlocking matting, you know the stuff you can use inside or outside as i saw some cheapish in b and q the other day, it also looks easy to lay. Does anybody use this? It wouldnt be for any fall heights, just instead of the stones etc. my question is, if you do have it, is it terrible in uneven areas? also, with it being water resistant where does the water go? Any advice from those with other stuff is also appreciated