Not really sure how well those things would tile.

But as for the quality of the tile itself.. I rate it a 6 out of 10.. It highly lacks any sense of depth. Instead of cliff tiles it almost looks like it would be used as a stone path tile or something of that sort.. I would recommend trying to shade it to make it more top-down perspective like. But other than.. its rather good for your first time making cliff tiles, keep up the good work!
