We have stayed at Ondrej's place for 4 days in December. In the interaction with Ondrej has been excellent, he has been very helpful. The apartment could not be in a better location. Close to the metro and walking distance from everywhere if you like walking. It is an old and charming building with a nice garden and a nice café on the ground floor. The apartment is also very charming and comfortable. It is not fully equipped for long stays, but for a few days exploring beautiful Prague is perfect. I would definitely go back to Ondrej's place next time.