Felik's apartment is in an incredible location - you couldn't ask for a more central point from which to explore the city. The apartment itself is spacious and stylish, but as others mention is on the 5th floor, with some steep steps. It was no problem for us (or our young kids), but it is worth pointing out. Whilst no air condiitoning, the flat is cool and there are powerful fans in both bedrooms.
The communication from the hosts was great and always prompt. There was also plenty of tips for things to do locally and places to eat and drink.
We would certainly recommend it.