Rented this with my partner and two friends. The apartment is clean and has good facilities. What makes it really great is the local apartment manager Anka, who said when we arrived "If any problems at all, call me, even if it is 3am, just call me". She arranged a hire car which arrived within 30 minutes of us asking for it and which we were able to drop off at the airport. Whenever we text her with a question she replied within 5 minutes. The website for the apartment also has a really good list of places to eat and see (although, FYI, the "all-day breakfast" on the list finishes at midday!).
The downsides are that it didn't have Wi-Fi internet (especially considering most places in the Balkans have free Wi-Fi). Its also not ideally located and the short walk into the town might feel a little dangerous if you had children (sometimes pavement, sometimes not, and the Montenegro driving style can be a bit aggressive!).