We loved the fast communication (sometimes within one minute). Easy check in. We knew from previous reviews that is was a sober appartement. we loved it. Bring extra towels from home, bring some teaspoons if you will be needing those like we do for coffee and eating eggs. Beds are hard, but OK. Very spacious and in a lovely street. It is next to a cafe and if you leave your window open, the smoke of cigarettes gets inside. Its on the ground floor and you hear the people when they are outside in front of the window. Sounds awful, but when the windows are closed it is OK.
I will recommend this for a budget stay in Prague (we stayed for one week and it was my 16th time). Have seen better and worse.