Our stay in Ondrej's apartment in Prague was very good. Ondrej was extremely responsive to email before and during our stay. Although we did not meet him, we met with his neighbor who was very helpful. The apartment is extremely well located in Prague, with a very short walk to Wenceslas Square (<1 km) and a walk of about 5 to 10 minutes to the heart of Old Town Prague.
Everything in the apartment was as it appeared in the pictures, although it is important to know that the bathroom is up a spiral staircase. The entrance to the apartment was slightly difficult to find, so make sure to check with Ondrej before arriving about where exactly to meet. The apartment was clean and spacious. We briefly lost electricity during our stay, but a quick email to Ondrej resolved the problem immediately--he was amazingly responsive throughout!
Highly recommend!