They come as two sprues to a box, with each sprue containing enough pieces to make just over 2 feet of walls, including gates and a variety of end pieces, and have a nice, simple interlocking design. So between the two boxes that's enough for about four and a half feet of stone walls on the table. The plastic is nice and solid and the detail looks nice and crisp, so they should paint up well using the same techniques I used for the same company's farmhouse.
Here's a pic of the sprue:
Once painted, they should be ideal for farm boundaries, orchards or just the sides of roads.