I've played a few JMP courses, all of them modestly priced public tracks:
The Heritage (Bob Moore, Raleigh, NC): Solid course with a handful of interesting holes (14 and 18 in particular) and the occasional weak spot. Though a bit heavy-handed in the shaping department, the features they built do create some excellent, strategic playing angles ( ala Pete Dye, though maybe not quite in his class).
Doak Scale: 5.5
Roddy Ranch (Bob Moore again, Antioch, CA): I play this course regularly ($25 w/cart internet special). They built a couple of ugly lakes on the back nine, but overall created another solid layout on some overly hilly terrain. Every tee shot offers a smart option and an aggressive/risky one. The course is typically windy, but the design allows for enough flexibility in tough conditions to remain playable.
Doak Scale: 6
Callippe Preserve (Brian Costello, Pleasanton, CA): A municipal course built on hilly ranch land. Environmental areas throughout the course make for a few awkward holes, but generally the novice tees were placed to minimize the impact of these areas on high handicappers. The front nine is more spacious, allowing one to play away from danger at the expense of birdie chances. The back nine is a bit tighter and steeper. The course is always crowded (5+ hour rounds, even during the week), but there's a lot to enjoy.
Doak Scale: 5