Perhaps I took the name of the tube "River Run" a little too literally. Bought three of these to take my kids on a 6hr run down a river near my place. Overall they held up well and had bumps against rocks and some dragging across the bottom of the riverbed but lost a bit of air on the way. Had to stop about 4 times to reinflate (had to do with my mouth as couldn't bring the pump with us). They did hold up the 13-14km journey though and not leave us stranded.
The backrest having a separate inflatable pillow was great for support and the mesh bottom was a big bonus. Cupholders were oddly too small to fit anything.