For the Junior suite we got, the Kitchennette was fully functional (they have an individual portable electric burner instead of a stove), they have a minifridge and everything to cook with. I was positevely surprised and even for 4 people it was a really a good experience. It was very well kept and the bathroom was huge (a bit of an issue on the shower drain as it was not fast enough for the shower they have) but everything else was super. On the very expensive side, mind you, but if you are looking for something of quality and don't mind splurging, I can recommend it , specially if you don't want to spend it on a commercial branded hotel.
Note that they do have a specific hour for their staffed front desk so if you arrive after those hours make sure you contact them by phone beforehand.