We can really only reiterate both the five star ratings and comments from the other reviewers on this site. My wife and and I and two friends from Sweden stayed in the cottage in July 2014 and have plans to return!
As already reviewed, the location is ideal as it is situated in a quiet little street in the historic section of town and is so close to the beach, castle, restaurants, cafes, shops and town centre. My personal highlights were relaxing on Fourbourg beach, climbing to Fort St. Elme, and eating out (and cooking in!).
In short, the house was exactly as advertised, Collioure is a delight, and as a bonus the owners were fantastic to deal with and provided many helpful suggestions and advice before we even arrived. I only wished we stayed longer!
I am looking forward to staying in this gorgeous home again when I next travel to France and I am recommending it to my family and friends. Stu (Australia)