This is a useful base for a before and after trip to visit the Salt Flats in Uyuni. It is well located, has good beds, a working shower (although the hot water is sometimes temperamental), helpful staff and an adequate breakfast.
I would suggest bringing warm clothes not only for the cold atmosphere of Uyuni, but also for the rooms - they provide gas heaters, however these are also temperamental and as such as we regularly got quite cold!