I stayed at Romanas place over the Christmas Holidays. The apartment has a great location. We basically walked everywhere in the Old Town and back. The apartment is surrounded by markets and restaurants so it was really easy to buy what we needed close by without having to venture to the bigger supermarket which is really only a 10 minute walk. The Rooms are big, each with it's own bathroom. There are also two floors so people can have a different place to hang out if they wish. It was also spotless and the kitcken was equipped with what we needed for the 5 nights we were there.
I would say when we got there one of the glass doors from the bathroom was shattered, but they came in that same day and cleaned it out. So they were very quick to fix the problem.
The only thing I would say is that the apartment is very basic. They have very little decorations so it doesn't give it that homey feel. You also get just one pillow, one towel and hand towel and only three keys. So basically we had to share keys when someone else wanted to return to the apartment. The apartment is on the 7th floor, but there is an elevator (it hold only 3 ppl at a time) but it's pretty fast.
The communication with Romana was excellent. She always replied right away and someone was there to greet when we got there. So the check-in and communication was great.
Overall, the apartment is hugh and clean. It's only the little touches, but It works for a big group and was very comfortable. I would recommend if this is what you're looking for on a trip to Prague.