Pros:
Superb terrain for disc golf: Rolling hills, slopes and elevation changes all over the course, with some fairways incorporating both up and downhill into a single hole, and two holes (13 & 14) playing flat.
Great variety, requiring power and finesse with a nice mix of distances, lines (hyzers, annies/FH, straight), fairway types (mostly open, some lightly wooded, a couple densely wooded), and a few unique holes - never gets boring. Open (or relatively open) hole layouts allow for several different ways to attack the basket.
Excellent use of carefully tucked pins, guard trees, slopes and water to create challenging pin placements to keep you humble.
Nicely illustrated tee signs on with distance and hole-layout to help you find the next tee and get you pointed in the right direction.
A small stream comes into play and adds character, but isn't intimidating.
Course takes you all around a clean, well maintained, visually appealing, small, city park, with some really scenic spots, including a nicely landscaped garden, with a trellis & benches (genuinely suitable engagement and wedding photos) in between holes 14 & 15.
Cons:
Non DG traffic can affect, delay or prevent play on some holes (football & soccer practice).
Course plays near a road, parking lot, tennis court, which detracts from playability as well as the course's awesome atmosphere.
Personally I don't mind blind holes (this course has several), but they don't work well when other fairways are nearby. On quite a few holes here, the basket that seems most obvious from the tee belongs to another hole, and the correct basket is tucked away around a corner (threw at the wrong basket a few times). Navigation a bit tough in spots, but not too bad (course map was a big help first time out).
Concrete tees would be an improvement.
Other Thoughts:
Absolutely love this course! Without exaggeration, easily one of the most enjoyable courses I've played to date. Has a unique charm and certain vibe that's all its own. Despite its flaws, it really bumps up the fun factor. Not championship caliber (doesn't pretend to be), but certainly well designed and challenging. Has you continually thinking and rethinking about how you should approach your shot. Pins placed on slopes present risk/reward opportunities: an upshot that landed only a few feet from the basket ended up about 75 feet away after a particularly nasty roll.
Navigation and basket confusion will be an issue for some as I suspect many will visit this course only once or twice while visiting Frankenmuth (print course map).
SLIPPERY WHEN WET!! Pickles' review is spot on about wet or windy days greatly reducing course's playability.
While playing here, I was thinking, "a solid 4, possibly 4.5," but shared use of the land, (football & soccer practice), as well as the non-DG elements that can come into play (parking lot on hole 10, tennis court on hole 11), and lack of concrete pads have me holding back that half a disc. Perhaps lacking in terms of "championship pedigree" compared to excellent courses, Memorial Park is every bit as good they are in an altogether different way, and stands apart from them in its uniqueness.
There's a donation box by the sign near the 1st tee - Looks like the $ is being put to good use - no signs of neglect like many other courses. I hope the locals are earmarking some of that for concrete pads.
Bonus Info: Only minutes from downtown Frankenmuth - Michigan's own "Little Bavaria," known for its fried chicken, beer, and general charm. Great place to bring the family or grab a bite and a brew after (or in between) rounds.