Swan isn't a WDW resort, so WDW refillable mugs do not work there. Swan/Dolphin are the biggest bang for your buck on-property, IMHO (we prefer the Swan). As others have said - clean, comfortable rooms, great restaurants and fantastic convenience to EP and DHS, typically, at a fraction of the cost of a WDW deluxe room. For MK, we either walk to YC or Boardwalk or take a Minnie Van. To come back, we just hop on at BWI or BC/YC bus - we enjoy walking the Boardwalk, so don't see it as a huge inconvenience. You can take the AK bus from Swan and just take a BWI, BC/YC bus back or Minnie Van or lyft. The cost savings are worth any type of inconvenience to us. Plus, we are Marriott Bonvoy members, so enjoy accumulating our points there. You didn't mention this, but, if you booked Swan through Disney, I would re-price and book directly through Marriott or by calling the Swan directly.