Lucie's place was amazingly located. The metro and the tram were mere steps away, and transportation always ran to where we wanted to go without any extra changes. We were even close enough to walk to Prague Castle, and other locations that side of the river. Lucie's husband was the one to personally welcome us at the apartment, and they also answered questions super promptly and were very kind and accommodating, letting us extend our check-out time to match our departure.
The apartment itself is also nicely furnished, and we had everything we needed, including hangers and ironing boards and extra pillows. We appreciated the coffee machine in the mornings too! The sofa bed is large enough for two people to sleep in and comfortable, in case anyone is worrying about not having enough beds to go around. Everything was clean, and easy to access. However, it does get very hot during the day, especially during summer, and the heat lingers in the living room for the rest of the evening. If any of you are considering coming to Prague in the summer (I would advise against it after being baked) you might have to come up with your own way to combat the heat at night, otherwise without a fan, you might have trouble sweating your way through sleep.