A ex-shop which has been converted into an apartment just around the corner from a great street and overall great area in Montmatre. We caught the 54 bus from Gard du Nord from the Eurostar which worked really well as took about 15 minutes only (and nice to see the roads rather than be on the metro).
Because it is an ex-shop the layout is slightly different to what you might expect, like the toilet being upstairs but the shower and bedrooms downstairs (basement level). This wasn't a problem for us but worth knowing incase you would prefer natural light in your bedroom/bathroom.
The apartment is very homely and has everything that you could need and more! Excellent wifi, comfortable beds and a good shower!