We had a junior suite which was very decently accommodated (room 13). Plenty of space and a very good sized bathroom/wc as well. Service and check in were pretty faultless and the hotel is also very well positioned for most of the major attractions in Prague. Only issues were that we found the lighting in the bedroom to be a bit on the dim side. The only other area which I think could be improved is the breakfast. While there's a really good choice of cold food stuffs and good coffee/tea making facilities, the hot food in the steamer was somewhat lacking - rather poor quality, anemic looking frankfurter sausages - and the supply of hot food would sometimes run out. On our first morning we arrived just after 9.30 and there was almost no bacon left and the beans were finished. We asked for the latter to be replenished, although got the impression this wouldn't have happened automatically given that breakfast service ended at 10.00am. Also, the heater wasn't particularly efficient at keeping food warm. Given the cost of rooms at the hotel I would have expected eggs that eggs would have been available to order from the kitchen. All told, a very good experience overall, with some potential for improvement. I'm unsure as to whether we would stay at the Golden Key again, although we found the staff to be friendly whenever we met them.