We stayed at the Kiev Backpackers Hostel on Yaroslavl Val Street, right in the centre of Kiev. The best thing about it was the location, being really close to Kreshatyk, the main street, the Golden Gate, St. Sofia's Cathedral, the National Opera, the University, Andreyevsky Uzviv/Spusk.
However, every time we wanted to go out or come back in again we had to ask whoever was in charge which wasn't so good. Plus there was a rule about not eating.
This tip has the address "Yaroslavl Val Street, 28, Kiev"