We are a family of 5 from the US - having a 7, 5, and almost 2 year old - that spent about 30 days in July/August.
The location of the house is very good. It's a 5-10 minute walk to Plakias town where you have a huge beach, supermarkets, tons of tavernas, car rental agencies, etc. Everything you could need. It also has an amazing view of the town, sea, mountains, etc. The view is really breathtaking, especially out on the infinity pool deck. That said, it sits atop 2 very steep hills. You will get plenty of fitness if you do not have a car. Less fit/older individuals will want a car for sure. We did spend most of our time without a car and did the hills with the baby in a stroller, but we wanted the exercise. The other major negative around location was the wind. We spent roughly 30 days there and I would say there was heavy wind for 60% of the time. It didn't ruin the trip but the couple of days where the winds were excessively strong made the beach at Plakias difficult to deal with the whipping sand from the gusts. But the beach is REALLY amazing. Almost all soft sand, walk out with a shallow rise, not too cold or too warm, tons of beach bars/tavernas for drinks and food.
The house itself is brand new, very clean, and has nice touches. The infinity pool is beautiful along with the large back patio. The view is amazing. The kitchen is modern and efficient. The bedrooms are all large with private showers and toilets. There is a washer/dryer, stove/oven/microwaver and dishwasher on site and the Wifi was good enough to stream Internet shows and movies, music, and work/video calls. Dual fridge/freezer as well. There is also a portable bluetooth outdoor speaker to stream music. Negative would be that the pool heater seemed to get turned off, so we had to request it be turned back on a few times.
There are additional services the hosts helped us arrange like private chef and Greek language tutor for our older children. That was great.
The surrounding area has a ton of interesting and great beaches that are drivable. I mentioned the wind earlier, but within a 45 minute drive you are out of the wind zone. So it can be a good jumping off spot for day trips and you can maneuver around days where the wind in Plakias is strong.
One of the best aspects of the rental was the support team/hosts. Questions received a response within minutes usually. They helped line up private chefs, tutors, and provided great recommendations for restaurants, local beaches, etc. The linens were changed regularly and housekeeping was available as well. Really tremendous hosts. When we showed up the entire fridge was stocked with beer, cheese, olives, water, wine, etc. There was fresh bread and other treats. It was a tremendous welcome package that was greatly appreciated!