Marjan was incredibly helpful and friendly - he met us promptly at the front of the apartment building as arranged, and patiently talked us through the essentials of the apartment. He even helpfully provided a list of recommendations of good restaurants in the Vinohrady area (Hlucna Samota was exceptional - we went back twice!), and went out of his way to allow us to store our luggage in his personal apartment because check-out was at 10.30am, but our train was not till 11pm at night. Thank you so much for that!
The location of the apartment was great as well: just a few minutes away from the tram stop (where you can take 22 to most of the tourist attractions) and another 10 minutes to the metro station. We really appreciated being in a safe neighbourhood that was reasonably away from the main tourist crowd, yet still close to most of the sights.
On a minor note, the wifi connection at the place could be distressingly slow at times, but beyond that, we had a very pleasant stay in the apartment!