We stayed in the one bedroom apartment for 6 nights and enjoyed our time. The property is fairly new and it is reflected in the quality on offer. The amenities were all of a high standard, with the highlights being a very comfortable bed and access to a washing machine. The only minor downside was that the seal on the shower door wasn't great, so often the floor ended up quite wet, and the room could perhaps be soundproofed a little better - you could hear the elevator and people chatting in the hall, the bumps of passing trams and also some construction work that was being done on another business nearby. These weren't a big issue for me as I'm used to noise, but could potentially disturb others.
The property is very centrally located, a short walk into the old town centre and plenty of transport links nearby if you want to get away from the crowds.
Finally, the staff themselves were excellent. I had initially booked 5 nights before adding a 6th a few months later and they made sure that the two bookings were seamlessly linked. They were happy to offer some advice on the city and also happy to offer a restock of stock from the room in the form of coffee capsules and washing machine pods.
I would happily stay here again on my next visit to Prague.