My partner and I had a terrific stay. The apartment is stunning, and the hosts are extremely welcoming and thoughtful: they welcomed us personally, provided snacks and drinks, and had plenty of supplies—kitchen condiments, sanity products, etc.—that we were able to use.
We had a small issue with the WiFi one day. Mery helped me resolve it immediately.
The WiFi is extremely fast! I was getting ~500 MBPS download speeds at times.
The yard is beautiful and peaceful: there are animals, swings, chairs, artificial grass, etc.
Finally, the location is a bit particular. Yes, it is close to a metro station which takes you into town in ~20 minutes. However, the location itself is relatively "out there."
Overall, I wouldn't hesitate to stay at Mery's again. A unique and enjoyable experience!