From Saturn's Website

"The 12â Saturn River Raft/Kayak is a fantastic fit for fishing on your local lake or river but also serves as one of the most stable whitewater rafting kayaks in the industry. The high rocker curves, large tube diameters and high-pressure air deck floor provide an exhilarating yet extremely stable ride on Class II+ whitewater like no other river raft or kayak on the market!

The 12â Saturn River Raft/Kayak makes an excellent whitewater paddleboat for 2-3 people. Weighing less than 40 lbs it can be easily packed or carried into your remote lakes/rivers for a fun weekend with the family. This raft/kayak is a must have for RVâs or weekend campers and provides a completely different option for fun.

The raft/kayak comes standard as a non self-bailing boat but can be easily be converted into a self-bailer by cutting 6-8 round holes the size of a dime in the kayaks bottom along the perimeter. There is sufficient room in the non-air chamber perimeter floor to make that task simply and quick."

Their list price is in the mid $500s. That seems like an affordable float. Like I stated in the OP, looks like it might be susceptible to flipping, but probably OK for up to classs3 and fishing.