I got recycled asphalt millings, about 4 inches deep and compacted by driving my diesel truck over it a couple times, overlapping. It drains well, packs well and is doing a great job. If I had the time and equipment I would have compacted it better. Other than that, its fantastic. The recycled millings tend to stick to the tires a little more than gravel, so I have to sweep some loose millings off the asphalt and back into the pad every once in a while.