Location, location, location! Simon’s apartment is literally across the road from the Louvre! Amazing!
My suggestion would be that if you are able to, you bring a pillow or two. It is a firm bed and the very flat pillow that is allocated per person is seriously not enough. Ended up having to roll my jacket up to try and get some padding, under my head. That was the only set back, otherwise apartment was everything we needed for our time in Paris!