Jacques is surely one of the best hosts. Very attentive and kind, man of pleasant manners, he's trying his best to make guest feel like home. Be ready to take tons of useful trip advices, as for being in Prague as in Czech Republic in general. It seems he knows everything the tourist in CZ should.
Flat is bright and nice in general, comfortable beds, big drowing room, good bathroom, all kitchen and other equipment is freely available (special thanks for that). Chance to have breakfasts on a terrace with beautiful view is special feature. Also, though flat is "off central location", the way to center is very short and easy - 5 mins by feet to tram stop and 5 mins from there to center. Be sure living in Jacques' flat is one of the best variants in Prague.