Very lovely place on the top floor of an apartment block in a beautiful neighbourhood (Vinohardy/Zizkov) a couple tram stops from the centre of the city. Very good coffee shops (mama coffee), restaurants, and places to drink that are of walking distance. Beautiful mix of architecture to be seen too (Kostel Nejsvetejsiho srdce Pane church, Husuv sbor, and Park Tower). Also close to food shops like Albert and Billa for convenience and the occasional popup market that happens every other day by Jiřího z Poděbrad metro station and the Kostel Nejsvetejsiho srdce Pane church. Be sure to check out the local brewery Vinohradský pivovar on Korunni street 10 mins walk. Really great Czech restaurant called Hostinec U Vodoucha that is a 5 min walk too (but is cash only), great beer and Czech food.
Lenka is great and responds to questions promptly. Highly recommended.