Jan's place is ideal for a short stay in the city. My girlfriend and I were there for the weekend and didn't venture too far our of the centre of Prague, so the apartment was perfectly situated - pretty much walking distance from all the amazing things you can squeeze in in two days.
Great condition, comfortable, very nice green tea and spotless.
Should I find myself visiting Prague again in the future, this will be the first apartment I'd check out. For couples looking for a short stay, go here.