We were a group of 17 who stayed at Masia Sitges for a long weekend in September 2012, and we can't recommend it enough. The setting, within the national park, is simply incredible, not to mention unique, with the backdrop against the infinity pool being a particular highlight. The house itself is tastefully decorated and designed - no doubt as a result of the owner, Servais, having lived there before renting it out - and there's plenty of outside space for meals, drinks, games, etc. Servais and, his colleague, Luke, also provided delicious food, with local influences, throughout our stay - well worth taking up that option. All in all, a fantastic place and service.