Sarka's apartment was so so beautiful! It was very clean and it had everything we could possibly need. The traffic outside can be a little bit noisy in the mornings but the flat has double windows and a great sound proof door so you don't even notice it! Sarka was their to greet us and show us around the apartment, she'd also come up with a list of things that she felt we should go visit, (as we were only in Prague for two days) as well as a list of restaurants, one of which we visited on our last evening and was definitely one of the best meals I've ever had.
The apartment is super central and in a great, safe location. We saw all sights and walked everywhere because it was so close.
Sarka was also very responsive and helpful prior and post stay (I thought I'd left a memory card at the apartment! )
I would recommend Sarka and her apartment to anyone going to Prague!