Pros:
I've never played a course that does more with less. At a glance, South Temple doesn't look like much. The land is mostly flat and featureless, with only slow, gradual undulations across the park, and none of the holes feature much in the way of tree coverage. The only other remarkable feature in the park is a creek that winds throughout from noth to south. What makes this course impressive is what the course does well with so little in the way of challenging landscape.
The course is expertly designed, squeezing every ounce of potential out of the sparse wooded areas, gentle slopes, the creek and wide open areas. Even the wind conditions are used strategically to add challenge to a course that could have easily have been less interesting and fun in the hands of a less skilled designer. Plenty of very good scoring opportunities greet you in holes 6-11, but the winds swirling through the trees keep things interesting, especially on 8, 9, 10 when the creek comes into play. The rest of course provides plenty of challenge to the average player, with few easy birdie opportunities, and many of the more challenging sections of the layout. 18 may be the toughest hole on the course, a 420'+ par 3 with a line of trees between the tee and the basket. What makes this hole consistently brutal is that the hole faces the large open area of the park, and a 20-25 mph (or higher) headwind greets you almost every day, making par a great score even for good players.
Most holes on the course also feature pro tees, which add a higher level of difficulty for more experienced players. While a couple of these tees do not greatly change the hole, some add a considerable level of difficulty. This is nowhere more apparent than on #14. From the short tees, 14 is a definate scoring hole with a good drive. From the long tee, it's a 650' beast dog-leg right, under low tree limbs and then over a creek, making even a par 4 a difficult proposition.
Tee pads are concrete on each hole, and are in very good condition, as are the two-layer chained baskets. The concrete paths that wind through the course help keep your feet relatively dry during most of the course on wetter days, and at least every other hole has a trash can at the tee pad. The trash cans are well maintained and are emptied often. The grass is also mowed often by the city, which is very much appreciated. The signs give hole number and distance accurately, and are free of graffiti.
Cons:
As stated above, the park does not offer many interesting land features. The first three holes are not terribly difficult. Only two small saplings protect the #1 basket. They will make the hole much more fun in years to come, but right now the hole is really a tee and basket sitting alone in a field.
There are some areas on the course that have some undesirable plant species to watch for, namely poison ivy and bull nettle. Be careful when chasing discs into high grass or kneeling in shorts.
Other Thoughts:
Based only on the holes making up the course, a 3 is a fair rating. What bumps this course up to a 3.5 is the details that make this course such a fun play. Well-kept grounds, few park patrons to worry about and high quality tee pads, baskets, paths, benches and trash cans make this course a very fun way to spend a couple hours, and a course deserving of a 3.5.