According to the salesman for the ThermalDry flooring, DriCore is an organic material. Not good if it gets damp because it can breed mold.
Here we go with the mold scare. Sounds like the pitch from OC basement systems people.
The dricore has plastic on the bottom and has some sort of finish on top. While I was doing my plumbing and one of the joints failed under pressure, I was able to simply mop up the water from the driciore. The water actually beaded up. No matter what you put on the floor, if you get enough water damage to ruin it, you've got WAY bigger problems than what was put on the floor. So, it got damp. It didn't grow mold and ruin my house, make my wife leave me and get me fired and put me out on the streets.
And, I have to be thinking the drciore actually made me MORE aware of the water situation around my house. I have not a had ANY water problems whatsoever in my basement. However, because I was thinking about the dricroe I had just put down, after a particularly heavy rain, I thouhgt "I better go check." Sure enough, the drain in the walkout area right outside the basement was blocked and the water was lapping at the bottom of the newly installed sliding door. I managed to grab a shovel, get the door open and clear the drain from the doorway, so problem averted. Now I go and check around the area once in while. I think if I had put down something that I can just forget about, I wouldn't have checked and WOULD have had a flood.
I think this argument is down to "He said, she said." It's a personal choice. I love my dricore, as like others have said, it just feels like the rest of the house.