We've stayed at the cabins 3 times and are planning a return visit to them this coming Dec as we will be bringing my Step-Son and his family.
We found the cabins ideal for traveling with small children because of the added privacy, kitchen facilities & all the onsite childrens activities that FW offers.
As far as Disney Magic - How can one of the original resorts, with Chip & Dale hosting a singalong campfire, free Disney movies, boat launch to the Magic Kingdom, viewing the Electric Water Pagent & Wishes from the beach, pony, carriage & hay rides, petting zoo, Hoop Dee Doo NOT be LOADED with Disney Magic?????
Cons are definatly the bus service to Parks other than MK/ Epcot. We didn't mind the busses, but we also hadn't experienced the convienence of the Monorail or Epcot Deluxe resorts yet. I didn't find the bus service at the values or moderates to be any better tho - only the Deluxes top it significantly. The other con, which is a small priority to us, is th lack of slide/themed swimming pool. We were generally there during the off season or made use of the water parks.
I really believe the FW Cabins are a hidden treasure of WDW for families with young children.