Nice place - it wasn't completely clear from the description, but it has two proper beds. The sofa you can see in the picture does fold out to become a full size bed, and was very comfortable.
The walls are very thin - you can hear the neighbours do pretty much everything, but the guy upstairs was s good guitarist at least!
Check in process was very easy - Guillaume left us a key with good instructions. He communicated constantly and well.
The entrance to the place and the stairway are a bit sketchy, with uneven steps, but not too big a problem. If you are uneasy on your feet though, this place is not for you!
It is a large apartment and well furnished. Great wifi (if a ridiculously long passcode!).
The boiler takes a while to heat up, so make sure you turn it on long before you take a shower.