For us there was nothing to dislike.
We booked for three nights in late May 2015, definitely the off-season but nevertheless a relaxing time to visit Visby. The Villa Borgen is well designed, tastefully modern, well managed, perfectly located, clean, and staffed by courteous, helpful, outgoing employees. Any problems other guests may have encountered there were long ago fixed. High points: the generous tasty breakfasts and afternoon teas, the restful courtyard with its -- count 'em -- two Buddha statues and sunny tables and chairs, the subdued Scandinavian design of our bedroom with its comfortable queen-sized bed. Low point: finding the hotel (the Visby information center was totally inadequate and the hotel neither responded to my pre-arrival request for help nor included its address or a map in its confirmation). Note: we were assigned one of a half dozen "motel" units in the courtyard; it provided good value, but the room photos you will see online were taken in the larger rooms and suites in the main building.