Received a very warm welcome from Altan, he was super friendly and kind, helped me to lift my luggage for 2.5 stories of stairs, showed me around and made me feel like staying at a friend's apartment. He said the lock is tricky but his instruction is very clear so I do not have any problem with it over my 3 nights of stay.
The room is spacious and clean. WIFI works just fine. There is a kettle and a small fridge in the room that's quite handy. The wardrobe door is falling apart but I do not need it. Would be better if there can be a full-body mirror + a desk mirror in the room.
A shared kitchen is just next to my room but I didn't use it. The shared toilet and shower room are located on the upper level, some may find it inconvenient but it is not a problem for me. Didn't meet other guests at all but same as any typical UK apartment you can hear everything outside your room.
Checked out at 7am and a cyclist tried to rob my mobile right at the building entrance, so just be aware.