I replaced my solid winter cover last fall with one with a foot wide mesh strip down the center. Water is very clear, but there is a good bit of fine silt on the bottom. FC was 2 with .5 CC. Spring of 2013 with solid cover my FC was 5 and I'm pretty sure CC was 0. Water was clear with no sign of dirt. Pictures are from last year and this year. Not having to worry about pumping water off solid was the main reason for going with this new cover. I also didn't have to add much water back into the pool this year. Maybe and 1.5 inches! Hope this might help people decide on which type of winter cover to buy.
With solid cover spring of 2013
With mesh strip cover spring of 2014