Pros:
Short holes. Scenic and simple.
Cons:
Homemade baskets make putting a little of a challenge.
Other Thoughts:
Because of the rising water levels of the Mississippi River, the nine holes of this course are currently on the opposite side of the River Road. Instead of turning left on Lockhaven as the directions state, turn right and you will see the course to your left and right immediately (on Lockhaven). The nine holes behind Piasa Harbor are still there, but the area is too muddy to play. From the looks of it, they pulled the baskets for now and intend to eventually return so that both sets of nine holes will be combined for an active 18-hole course.
I have nothing really to add to what the other reviewers have already said. As an Alton local, I prefer Rock Spring and Sioux Passage above anything else within a 20 minute drive. But if you're around for Rock Spring and want a fun short course, this is not bad.
I have several friends I play with who had a better time here, just because they throw wild and lose discs in the woods too often at Rock Spring. Of course, having said that, we lost two discs in the lake on this course (but dove in to retrieve one of them!).