Pros:
Premier course with almost everything you could ask for, and has made some new additions very recently to up the enjoyment.
1) Variety & Challenge - this course has wide open, big arm holes, short, narrow, wooded technical holes, and features a ton of flight lines, and will make you use just about every shot you have. Very challenging - the longer the baskets are out, you will have your work cut out for you to throw a decent score.
2) Nice new baskets that catch well, and have bright orange bands for visibility.
3) For as nice of a course as this is, Brown Deer is RARELY crowded.
4) Every hole has multiple pin locations - most holes have three, but there are a few with two or four - the different pin locations will yield much different holes, and several of the longest pin locations give you a "signature hole" feel - I'm thinking of 2, 8, and 16 in particular. EDIT - JUNE 29. 2017: 2 new long positions over a creek & into the woods on 11. Add this hole to the list on either of these positions.
5) As of October of 2016, this course is now 21 holes! Three new holes have been constructed between 7 & 8 - two go over water, and one is a plunker through some cleared out woods. I hear through the grapevine that more are coming, but as of this review, there are three new holes.
Cons:
Not much downside, but it's hard to find a perfect course.
1) Having played this course hundreds of times, this doesn't faze me anymore, but for a first timer, there is a bit of a counterintuitive connection between 2 & 3 (have to go out a narrow woods path and cross a road), and the tee for 16 is right next to a couple of 14's basket locations, making 15 really easy to miss. In addition, the walk after "7-C" is a bit of a back-tracking trek close to the other two water holes, but I suspect this is a work in progress and will change when the rumored more holes are created.
2) Not a whole ton of elevation. The course uses what it has well, and adds value in many other ways, but most holes are pretty flat.
3) The challenge of this course is fun, but a few holes are borderline unfair with how utterly narrow a gap you have to hit right off the tee.
Other Thoughts:
Some folks prefer the more wide-open (but still very fun) Dretzka, and I used to call the two even in terms of enjoyability for different reasons, but the new baskets and new water hole loop seals the deal for Brown Deer as the Milwaukee area's premier course. The recent change (as of 1/1/15) on the Milwaukee County Parks courses to P2P has ruffled the feathers of some, but in my humble opinion, the P2P move has made major improvements to the County Parks courses, including more benches & garbage cans, more consistent signage, just better course maintenance overall, and outright course overhauls/additions like this.
Brown Deer may be a bit much for a beginner, but for anyone with the desire to play a challenging course, it is a delight to play, and absolutely worth going out of your way for.