We had a very nice stay at Louis' place. The apartment is in a great location, very central while in a quiet street. Louis was great to communicate with and let us drop off our bags early which was much appreciated.
The bed is smaller than the usual queen size but still suits for 2 if you're ok with not much free space around.
A bit difficult to cook in the small kitchen but totally fine if you keep it easy or just plan to mostly eat out (Paris' studios rarely have much kitchen space anyway...)
Would definitely stay again.