Where I live and considering the season right now, cocofiber and a water bowl topped with heat pads, lighting, etc do not provide optimal conditions because the cold weather makes it harder to keep the tank warm. A water set up with a filter and water heater, which keeps my water warm with an ambient tank temp of 82 degrees, seems to keep my frog happy. There are also some rocks to climb up on when my frog is tired of the water.
Anyway, I think its just a matter of preference, and everyone is entitled to their own.