We stayed here for 4 nights in the beginning of August. Prague is known for it's high rate of car thefts, so our main concern was to find a hotel that offered a private parking. The Merrion Hotel advertises with: "The hotel offers a private car park and garages."
Well, they don't. There are some parking space right in front of the recption, but they are just public and are NOT owned by the hotel. There is a private carpark down the street where you can park for €10-€25 per day, but this is also not property of the hotel. We were not keen on leaving our car out on the street, but we also didn't want to pay so much money for a parking so in that way, the hotel really disappointed us.
The room itself was cosy, with minibar and safe. The breakfast was excellent, and the room very trendy. The bathroom was quite big, with a rainfall shower and very clean.Pretty luxorious, though price-quality not the best hotel we ever stayed in.

This is such a nice hotel, quiet and air conditioned. The bed are extremely comfortable. There is free broadband if you have a laptop. There is a safe and mini bar. There is a flatscreen tv in the room and if you want to watch extra channels you can buy a remote from the reception (Smoovie system). The room prices are very reasonable and I stayed there for 14 nights and got a free room upgrade. The hotel itself is 5 mins walk from a tram stop. There is a large supermarket 3 mins walk from the hotel where you can buy almost anything.A half litre bottle of premium Czech beer is 25pence 10Kr. The price paid for the room was the same as I paid at the Three Crowns hotel and the room is double the size and far more luxurious here.

Very new little hotel, that certainly deserves its name, and may even be described as luxurious. Located in a quiet and rather green area, about 3 kms away from the city center, and you can park, free of charge, just in front of the hotel entrance. Ample rooms, with a contemporary look throughout, extremely clean. Mine was facing the rear of the building, and no city noise seemed to reach it. Nice lobby. Lovely breakfast in a brand new verandah. Quite a good choice indeed.

We stayed for 5 nights over New Year in this brand new, small hotel.

The rooms are modern and stylish, the bed was really comfortable (although made with 2 single duvets which seems to be the norm in Prague) and the shower was fantastic!! Unfortunately the bar and restaurant were not yet open due to the hotel being so new even though they were mentioned in the information, however the minibar was the cheapest we have ever come across.

There were no tea/coffee facilities in the room but this was available via room service.

Breakfast was a simple, serve yourself buffet affair - but the choice was pretty good.

The hotel is located in a quiet, residential area but there are tram and bus stops into Prague centre within walking distance. The buses and trams run really frequently and the night trams from the city centre are roughly every 15 mins and run all night so getting around is really easy. Maps and travel tickets are available to buy from hotel reception. The hotel also offers an airport car.

The hotel is close by to a couple of places of interest: Zizkov TV Tower, the grave of Franz Kafka and Zizkov Hill.

We would not hesitate to recommend this hotel.