We were in the 'top floor' one bedroom apartment with a private terrace. Everything that you need is there. It's also quite a bit bigger than it appears in the listing photographs. Ermioni is a wonderful attentive host who checked that we had enough bedding and towels half way through our stay. She also arranged a friend to collect us from the airport for a very reasonable price because the bus wasn't as reliable at the time we were arriving.
It's a perfect location if you want to be close to the town (20 mins walk) but not right in the midst of bustle.
The sea is a mere few yards away from the apartment, just across the road and was almost private while we were there.
It's very well serviced for public transport with a bus stop right outside the apartment. There's also a great bakery opposite, a bar/cafe about 5 minutes away and a brilliant beach bar (Valentina's) about 15 minutes walk away.
If you're visiting Rhodes and enjoy a bit of peace and quiet while being close to the town then this is the place for you.