Floats Good - No floats bad!
A colleague of mine called Art Swain gave an SAR demo off Lyme Bay which ended up with rapturous applause from the crowd on the beach when the engine stopped at the end of the display. Calm sea - floats popped as advertised and he climbed into his dinghy from the wheel strut dryshod.
Colin Bates did a great demo some years back of a 206 on floats autorotating into the water - nice stable floating platform on flat calm water.
BUT if one of the floats doesn't inflate or bursts, it'll roll, a blade will hit the water and you won't know if it'll dig in or flip the aircraft over onto its other side. In any event lots of thrashing about.
If in doubt do the dunker!