Rhapsody Apartments made my stay in Santorini a very comfortable and enjoyable one. I was here in the middle of July, during peak season, and staying here was a good respite after being amidst crowds of tourists all day. It is quiet here, and as other reviews say, it faces east, which means away from most of the crowds (for me, a very nice view after a long day).
The apartment itself is incredibly spacious, comfortable, and clean. I had a very enjoyable stay here. Keep in mind that it is about a 20 minute walk (along the caldera - a very scenic walk) to Fira, the main bus terminal, or only a couple bus stops away. If you're coming back late at night, keep in mind this place is located off a main road and it is not well-lit, so you just have to take caution.
I would recommend staying here if you're planning a trip to Santorini!