The Sunstar Beau Site is a small, friendly hotel in the heart of Saas Fee. We had a "family room" - actually a suite with a double bedroom, a separate smaller room with two bunks, and a bathroom. The rooms were a good size with plenty of storage space for bulky ski clothes (including a useful rubber mat for wet boots). Reception was exceptionally helpful - one of our daughters fell ill and they arranged a doctors appointment the same day - as were the porters who were always ready to drive us around the resort in one of the hotel's electric buggies (the only type of vehicle allowed in the village). The playroom was a big hit with the kids as was the pool. A number of reviewers have commented that the pool was cold - it's kept around 28 degrees which is perfect for actual swimming, admittedly perhaps a tad cool if you just want to float around.
The hotel is in the centre of town on the main street with a ski hire shop downstairs, a supermarket across the street and plenty of restaurants and cafes close by. It's about a 10 minute walk from the main ski lifts - if you don't fancy lugging your equipment over every day, as well as the hotel buggy there is a free bus service that stops close by, or you can leave your equipment at the Cesar Sport depot by the slopes (CHF 3 per day, with heated boot hangers to keep them dry).
We stayed half board which at CHF41 per person for four courses (half price for kids) is a good deal given the cost of food in local restaurants (e.g. CHF25 for a cheeseburger...). Service was efficient - most nights our kids did not last the full 4 courses but at least they could head off to the playroom while we finished.
My only (very minor) criticisms of the hotel are that the pillows provided very little support (we stuffed them with cushions from the sofa) and the timing of the evening turndown was somewhat inflexible - I suspect because it is a relatively small hotel and so they have fewer staff than in a larger establishment. Despite these niggles, I would have no hesitation returning to the Beau Site.