Our Group ranged from 12-18 over the course of two weeks, mix of adults and teenagers. plenty of bedrooms and space with a great pool and wonderful views over the bay (located up steep hill). In all we had a great time, Kalkan itself was charming with a good mix of bars and restaurants with shops without the usual aggressive hawking. Beach clubs and boat trips great value. the pound goes a long way in Turkey. A few set backs with the accommodation - occasional power cut seems pretty normal and we lost water for a couple of days (countered by reserve tank in villa) but water pump broke and we had last couple of days without a pool. the eever keen to help Mehmet was always quick to respond to no bedding linen after week one or addressing the pump problem.
Would I go back to Kalkan - definite yes, would I go back to Meri - cautious yes as it was a great spot with plenty of room to spread out.