This is an absolute splendid location with just 5 walking minutes to the nearest beach, but even other beaches still in walking distance. The water was already very warm to swim even in late may! The appartment is spacier as it seems from the (wideangle) photographs - it hosts 4 with ease. It's very well equipped with hundreds of cute things (perhaps bring a large bread knife), and it's fun to shower outside after the beach stay. We had hardly any noise around except of the birds tweeting excitedly in the morning, a car passing every now and then, and on some days few military jets. So relaxing on the patio with either sun or shade - as you like - is an excellent alternative to the beach. The flat was always cool enough even with no windows open at night, and outside temperatures of up to 30°C over the day. Our Fiat 500 had enough space inside and was not even in the way.
When you get yourself bicycles (cheap, good service, near the post office), you are very quick in and out of Porto Cesario Centro, otherwise a 25 minutes walk does it, too.
Alltogether a brilliant choice if you settle for the ionian coast, also because here the communal (or state) politics try hard to protect the nature.