There are some really great things to say about this place.
Great Location. (in a secluded block off of one of Paris's most multicultural streets)
Great Bed. (extremely comfortable)
Great Host. (considerate and accommodating)

There are also, dare I say it, also a few small but maybe important challenges The apartment is very compact and this makes for a very communal style living arrangement (the host sleeps in the lounge on a pull out sofa bed). The bathroom is accessed through this lounge and the guest bedroom is down a tight spiral staircase. The bedroom also has no real ventilation to speak off.

But you are in Paris and you should only be indoors fleetingly so if these few small challenges don't test you then you will love everything about Cyril and his little place in the 10eme :)