Touristy, overpriced mall with goods of fine quality at a significant markup to what they would sell for anywhere other than in a beautiful and historic building in a beautiful and historic area -- and yes, the building itself is quite gorgeous. The stores make for okay browsing but unless you're a tourist on a whistle stop tour you'd be better off shopping in other districts.
Stop for photos, use the restroom, buy nice somethings if you have money to burn, otherwise move along.