Loved the private spa, which has lots of spigots, massage jets, and several jacuzzi areas. There was also a sauna and hot steam room, all free for hotel guests. Breakfast was the best hotel breakfast I've had with a very large selection, including lots of fresh fruit. We had a room that was facing the other building, so nothing special there. The traveler pass they give you gets you discounts to the local area activities. You get free tennis, ping pong, badminton etc time at the sports arena, but you have to pay to rent equipment, which was reasonably priced. If you have a travel pass, use that to purchase Gemmi or Rinderhütte tickets. If you don't have one of those or you have a flex pass and it's not a travel day for you, purchase the Gemmi passes at the reception desk (they just add it to your hotel bill) for 20 CHF round trip instead of the normal 34 CHF (but it's 17 CHF with a Swiss travel pass).
Overall great experience at the hotel, the private spa was definitely worth it over going to the public thermal baths.