It's a two-bed apartment: one double room and one room with bunk beds. It's second floor with two balconies. It's part of a hotel complex and you have access to the hotel bar, restaurant, and pool. The hotel grounds are very nice and the town itself is also lovely. The beaches all along the Opal coast are great; big and wide with nice sand and dunes.
The actual owner is a company called Sergic Hardelot. So if you book via HomeAway be sure to look out for communications coming directly from Sergic and not from HomeAway. Sergic don't speak much English (as is quite common in France).
The bed in the double room is queen sized, I think; it's certainly not standard double anyway as our sheets didn't fit properly!