Never been to this hotel but Agia Marina is great.

Hi,
The Santa Marina is a smart, well-situated hotel. In fact it is on both sides of a busy road. I remember when it was one of the first tourist hotels in the village. The beach is great in that immediate spot.
It's a long walk to Platanias but the public transport is good. It is expensive however compared to the average for the area....but it's nice.
Hope this helps.