I stayed at Sunset last year and although lovely apartments and complex, I did find it a bit too remote. It's just that last stretch after the Dolmus station that is dark and unpleasant to walk on but having said that, I believe the Dolmus goes past right outside in the summer.
I like to be closer so I can go for a wander around the shops/bars for an hour without getting the Dolmus but it was a bit too far to walk for me in the heat. In fairness though, it is easy to get to the Prom if you like to stroll and has a lovely view of the beach and islands - oh, and the staff were great!