I walked Erin Hills recently and had a chance to look at the 10th hole and the green, which is nearly ready for play.
Although I find it difficult to get a very good feel for a hole without actually playing it, I have a few observations:
1) Most players won't play it at 600 yards plus, and it won't play as long as the yardage due to the terrain (I am not convinced that it will play with the wind, however!)
2) This hole really looks great from the teeboxes and there are some challenging decisions to be made on the tee shot due to the excellent routing on natural terrain and the well-placed bunkers.
3) The green is very unconventional, maybe over the top. But someone earlier said that a par 5 might be the perfect hole for a Biarritz because there are many options to attack it.
4) In the final analysis, I really liked the looks of the green because, since it actually existed just like it is, it looks so natural and fits in so well with the surrounding terrain (and don't go right, it is certain death into a ravine).
5) Will I like it as much when I play it? Stay tuned!