Drove to the midwest in mid-August and stayed at Forest Dunes so I could play The Loop in both directions. At the pro shop I bought a yardage book for the Red, as well as for the Black. (I think those colors were chosen so they couldn't offend graduates of either UM or MSU)). Got out to the course and found it was the same booklet. Hint: draw green slopes and green surround slopes in the yardage books.
Agree about the conditions. I picked up about 10% in distance, which meant dropping 2 or 3 clubs on approaches. More if you are a low ball hitter. Because of the concept, greens are generally not sloped back to front and you get some stupendous runouts.
Despite knowing that the course is reversible, it seemed totally alien when I played the second day. Distinct features from the previous days were not prominent from the other direction. Some greens switched from a par 3 to a par 4 with the reversed directionality, which kept the par 3s fresh.
After two days of the Loop I played the Weiskopf course. This was my third trip to play golf in Michigan and Forest Dunes was never on my radar (I am a linksy). Now that I have played the resort's original (and only) course) I have no jones to go back for a second stab. In my interpretion of the Doak scale definitely not a 7 or a 6, hard put to give it a 5.
That is certainly not the case for The Loop.
When the Midwest Mashie actually can get there, DO NOT HESITATE to sign up.