The staff at the reception is extremely friendly and helpful (in the breakfast room less so, though... ). The location in centre guarantees for relatively short distance.
My room had a very low standard. It was clean, but otherwise more or less the standard of a **-Hotel in the 1980s (no proper wardrobe, far too few plugs and in strange locations, suits will need to be hung on hangers in the room (due to lack of wardrobe), no proper desk, nothing to hang towels (all were laying on small stool in the mini-bathroom, falling down on the floor all the time...), water in the shower didn't drain properly thereby risking to flood the bathroom, entire room was very small, too...
==> if I was backpacking in Wallis and this was a **-Hotel in a remote valles for 40 CHF a night, all would be fine. When I am on a business-trip to Geneva, paying almost 200 CHF a night, I'd expect something different.
VERY Noisy. Cornavin has heavy traffic all night, and the windows and walls don't isolate very well.
Breafast was spartan, the breakfast room is too small, so you may need to wait for a free chair at some table, and the lady in charge of the breakfast was pretty unfriendly.
There is only one elevator for a large hotel, which leaves you with the choice to wait ages in the morning, or to walk 4 or 5 floors up and down (the latter being ok for me, just when you have luggage and you'd need to be quick, it can be somewhat annoying).