I went to Sulata today. The hotel opened less than a year ago so not too bad. The room wasn't so big. 5,800 for 4 hours.
The reason I chose that hotel today is that they have a free cake buffet. Actually for lunch we went to the famous French bistro Viron. Somehow they managed to serve the main course before the appetizers so we decided to skip the dessert there...
I don't remember the name of the place but there is another hotel with a 'New Open" sign. You can't usually go wrong with the new places as some of the hotels in Shibuya are pretty old.