Michael's place is spacious, clean and ideally situated in the centre of Prague. The pictures are really accurate.
There is a metro station within 2 minutes walk which allowed us to go anywhere quickly.
Michael was always prompt to reply to messages and speaks French, which was a plus for me as I was traveling with my dad who does not speak English.
I highly recommend staying in this place, it was very confortable for 4 people but could easily accommodate 6.
Bonus: for great breakfast go to Café Louvre in the neighborhood, it's amazing. A good place for dinner is also l'Osteria.
I do not recommend the shop under the apartment. I think they gave us the "tourists treatment" (overpriced).