Not so many apartment blocks have a small pool and sauna in the basement so high in the mountains, that's an added benefit which the kids in particular love.
The place is very accessible - you could, timetable dependent, and more easily child free, get to the apartment on public transport if you had to; the Sion bus stops virtually outside and the train station in Sion comes from Geneva or Milan. Being only 20 minutes up from Sion, makes it quite useful if you don't like a long transfer (which I don't personally like too much on windy mountain roads), so that's very civilized in my view!