My father and I booked a last-minute half-day rafting excursion as we were passing through Moab this past weekend, and were so happy with our decision! Even though we were not in season for optimal rapids (only Class I-II in early August), we had an amazing time out on the river. The calmer water even allowed us to take a swim in the Colorado during our excursion. Our guide, Charbo, was extremely knowledgeable about the area and kept our group entertained the entire ride. All the guides were professional and fun, and we loved the entertainment provided by them on the bus ride to and from the boat launch. We could have easily done the full-day trip if our schedules had permitted!
Highly recommend going with them for all rafting or otherwise outdoorsy excursions in Moab. We will definitely book again next time we are in town.