I stayed there for 4 out of my 6 nights in Warsaw in June. The location overlooking the Castle Square was excellent. The Square is very lively so I enjoyed leaving my window open during the day, and it was quiet when the window was closed at night. The hotel is close to great shopping and dining options, as well as convenient to the rest of the Old Town, the Royal Castle, the riverfront, museums and many other interesting sights. The city is very walkable, but there is also good public transportation. The room was clean and had a nice view, and the staff was friendly and helpful. There is an Uber, Bolt and taxi pick-up/drop off area just around the corner.