Don't know what est-gratuite considers expensive, but I stayed on Friday night for 120 francs.
I am with you on this. It has not been my experience that Hilton is expensive like in the city as @
est-gratuite mentioned. You can very often get the Hilton for less than 200 CHF, sometimes close to 100 CHF as mentioned by : D !. In the city I have paid 250 CHF sometimes over 300 CHF for Sheraton, and heck even for Four Points.
Some other hotels around the airport do not offer as good value as Hilton in my experience. I tried Novotel once which is modestly cheaper than Hilton but what you get is several notches below Hilton.