The hotel is lovely. We had a beautiful junior suite overlooking the lake (ok, from a distance but still overlooking). Lovely fruit bowl awaited us and the heated towel rack is always nice. The property is beautiful, with walled in gardens and a castle. The breakfast was very nice and varied. Parking is on site in an enclosed garage which is very easy to manage.
If you're looking to get away from it all, and have a car, this might be a great choice. The property is really remote, with about a 10 min drive to the lake and the town of Arona. You have to drive up very narrow streets in order to get in and out. Buyer beware, there's nothing to walk to - you have to drive each day.
Also, although you have a tv in your room, the stations are only in Italian. We were a bit surprised as this hotel prides itself on being award winning, that they wouldn't have the satellite that would give you a few (one?) station in English. Again, great if you want to get away from it all.