I have two thoughts on this — well, three:
1. It is one of the most encouraging PGA undertakings in recent times.
2. Arthur Jack Snyder, who used (and fabricated) furrowed rakes while he was at Oakmont, often remarked "...once you get used to hitting out of furrowed traps, it becomes easy — in fact, you always have sand to cushion the shot with furrows." Jack heard this from Lew Worsham with whom he often spent time discussing Oakmont and changes which were made to the course — and the traps*.
3. In response to J. McKenzie, who says, "I just don't think it should play a larger role than it does naturally. Furrowed bunkers provide lies that are too random..." Really? I think we need to go back to nature — nature is 100% random when it comes to pits, hollows and dunes. In nature we have areas which are compacted, others which are loose with sand and debris. If anything, a furrowed bunker (see Snyder's comments in "2" above) is a trump to randomness.
*Yes, "traps" — that is what they were called in Western Pennsylvania in early days.