There are long and short primary loops plus less maintained connectors so you can take as much or as little time as you like. There is a fishing pier, views of the man-made island channel and the mighty Mississippi, factory ruins, an old quarry, and woods to explore and escape for an afternoon. After I crossed the pedestrian bridge, I only saw two other people the whole time I was on the trails. On a fall weekend there were maybe a half dozen cars and probably five out six owners and passengers of those were using the shore path and not venturing out to Sylvan Island. The paved lot is not huge but more than roomy enough.
It is worth it just to see the Deere srt installation steps from the parking lot. To find some seclusion in the city of Moline, follow the signs to this park tucked behind one of the Deere plants (seeding, if I remember right) at the end of First along the border with Rock Island.