When our ground level apartment (our basement really) flooded a few years back, we removed the skanky wall to wall carpet and dried out the concrete.
We remedied the flooding problem, but our water table where we are is pretty high and our basement apartment slab floor in the livingroom is well below grade.
The possibility of water percolating up through the slab in the future was a strong possibility despite all of our drainage and regrading work.
So we went with this product that we could not recommend ENOUGH!
it is a floating floor (only glued at seams, if any) we had to smooth out the concrete prior to installation but it was quick and painless and done quickly. The floors edges are held down by baseboard mouldings and the material is thicker and chushier than anything similar. If it gets wet the base trim comes up, the flooring gets rolled up dried out and reinstalled....pretty genius.
We've had nothing but compliments over the past 3 years from renters and their guests.
FiberFloor from Tarkett:
Tarkett > Products > Fiber Floor
FiberFloor From Tarkett - The Newest Flooring Sensation (http://www.flooring-trends.com/fiberfloor.html - broken link)