Patrick:
I kinda like them as I used them on holes 2, 3, 5, 7, 12, 16 & 18 on our Arrowhead Golf Club in various ways. That may seem like a lot of ridges, but the degree of slope, the angle to the line of play, front left to back right or visa versa for example, the transition from front to back, the tie in to other contours and the pinning area they establish or protect depending on the case at hand, leaves me and the golfers options to create fun and challenge. I also like to incorporate a few run out areas toward the back left or right of a putting surface based on and balanced against the ridges mentioned. of course this is all taken into consideration with other features used such as bunkers etc. It gets them every time when they go after the pin and watch their ball side out the back door. The interesting part becomes how to build them so they don't look as though they actually run away from play and disguise them to fit in to the remaining contour.
Brent: "To me a big bonus feature in a course design is when the "hardest hole on the course" can change from day to day depending on where the holes are cut." I would agree with this statement and at courses such as Arrowhead with a wide open windy element and strong prevailing breezes here in western NY, each hole can and usually does play quite different and even different again depending on the season. Now we have the summer winds from the southwest and west and then in the spring and fall we often get north/northest winds and it really gets interesting.