Minas Apartement is ideally located. There are atleast two supermarkets in near walking distance, with Spar being maybe 20m away. There are several restaurants, car rental services and bakeries near the apartement, so everything you might need is in walking distance. We spent 4 days on Kos and as Kardamena was quite quiet (maybe because it was only the beginning of April) we rented a car for one day and visited Kos City with the bus, which I would both recommend. The island Kos is really, really beautiful and if you are staying longer, i would rent a car for longer. In April there are only 2 busses a day to the airport and 3 to Kos City, to get to other Cities you would need to go to Kos first, therefore a rental car does defintely make sense.
The apartement itself is more low-budget, there are only few kitchen utensils, the bathroom isn't thaat clean, the wifi doesn't work that well, the toilet makes a weird sound after flushing and there is some mold near the balcony door. Still it was totally fine for us, as the beds were comfortable and clean, the shower was hot and had enough water pressure, the balcony is super nice, we didn't cook that much and Minas is really nice.
All in all we would recommend the apartement, especially because of the great location, basically you shouldn't expect a 5-star-hotel :D