Andy,
Pay no attention to naysayers. I've played almost 50 different courses on the Strand, and I'd put them up against any 50 public access courses in a comparable geographic area anywhere. Bar none.
What happens, IMHO, is that the quantity is so great that it is difficult not to get lost in the shuffle, and the overall quality is assumed to be poor. In fact, the average course in MB is fine, and the good ones are terrific. Many of the good ones have already been cited here, so I'll comment on one that is "average".
The Witch is a Dan Maples design that is very run of the mill on the MB golf scene. It isn't new, it isn't exclusive, and it isn't expensive. It is, however, an excellent design, and if it were elsewhere, say in your hometown, it would be one of the elite courses in the area. There are a number of such courses there. The Pearl West is another Maples design that I think is excellent, but gets little attention.
I think the implicit assumption by many on this site is that a place that is so completely public (and make no mistake; MB might very well be the capitol of public golf on the planet) must be inferior to places that are more high ticket and exclusive. This is the worst sort of elitism, because it has much, much more to do with the people that play there than the golf courses themselves. Ignore it.
I'll say it again; the GCA at MB will compare favorably to any area of a similar size for public access golf.