I liked many aspects of the Kurhaus Lenzerheide, but there were too many things that did not work.
Plus side: The design is nice, the concept is good and the rooms are cool. The staff (when they could be found) are nice and quite friendly. The food is good. Location is excellent and quite near the PostBus station.
Minus side: The hotel often felt like a hostel. The common areas were not cleaned often enough, so used tea, coffee and other glasses were left on every surface. In the evening there was a very large group in the common area/bar which was definitely in violation of Covid-19 restrictions - however no staff was onsite to regulate or to give earplugs for the banging of doors long into the night.
For CHF 100 this is ok, for CHF 260 it is not.