Small, but tiny flat near the tube station (5 and 9 mins walking) at the downhill of Montmatre. You'll find there evth nedeed for living, except, may be, kettle :) The minimum of space - especially at kitchen - is compensated by the ideal cleanness, nice bed and big TV. You could be bothered a bit by the noise from the street sometimes or from the neighbors bathroom, but only if u're a sensible one.
Slim is a perfect host - always ready to answer the questions, to help and to make your stay as much comfortable as possible.
So I recommend this place to stay, if you are eager to spend as much time as possible in Paris - and go back home to have dinner, watch a bit of TV and sleep for some hours before the next series of discoveries in the ctiy