We stayed at Марта’s place for five days during New Year's weekend. It was exactly as it looks in the photos. It was beautifully decorated and very spacious for the five of us. Also, the place was squeaky clean. The kitchen was also great, and fairly complete to cook some meals when we didn't feel like eating out. I loved how the Марта thoughtfully provided ALL the necessities--it was so well thought out that even the detergent for the washing machine was available. If I had to point out any flaw, it just might be that the wifi signal did not reach the bedroom (but it was strong and spotless in the common areas).
Just note, by the way, that this apartment is in Prague 4. The closest tram to the center (Prague 1) is a short 5 minute walk away, but the travel takes about 20-30 minutes. But for us this was a good enough trade off, considering the price we paid to comfortably stay at Марта's would have been the same amount for staying in a more central but really cramped hostel.