This is one of the best hotel I have stayed in Japan within reasonable prices. I was visiting Center for computational science, Tsukuba University. The shuttle service of the hotel is very nice and convenient. If you are visiting KEK this hotel is also perfect. The one thing I love about the hotel is the public bath and the Sauna.
One thing is missing is the public bus information. That is a bit confusing if you are travelling from the Tsukuba center.