We have just spent 2 lovely weeks in Kevin's house in Pop Grigorovo.
We especially liked the beautiful big garden with the pool. There are cherry and pear trees in the garden, a superbe swimming pool, enough deckchairs for everyone, and several opportunities to lounge and sit, as well as a state-of-the-art barbecue where our teenage boys used to grill our meat. The house was very clean, not too big with two upstairs bedrooms and a bathroom as well as a downstairs bedroom with an ensuite bathroom (for guests). Since the winters apparently get very cold and humid, the latter room tends to be a little smelly. Otherwise, the kitchen is well equipped, there are several TVs (that we did not use) Wifi works perfectly, and there are enough bath towels for 8 people.
One has to really get along as a family, because if it is rainy, the house is quite small and the village is tiny...
You need to take the car wherever you go. To Balchik it's a 30 minute drive, to the next Lidl/ it's 10-15 minutes. Varna and the airport are a 50 minute drive.
Kevin was very quick in answering our questions, the couple who looks after the house was also very helpful and took us to see a vet when our dog had a health problem. Also they cleaned the house for an extra charge when we asked them to.
For a family who needs to calm down this is an ideal and peaceful place to relax, if one does not mind the driving.