Great location, very easy walk to Angel Tube station, which gives quick access to King's Cross Station (one stop away, major Tube hub) and to Bank Station (three stops away, with access to major British historic areas, sites, and attractions such as the Tower of London).
Angel itself is full of nightlife and fun, and the flat and surrounding area are very safe and easy to navigate.
The Airbnb is a flat upstairs inside a Georgian rowhouse. The entrance corridor to the rowhouse itself is slightly offputting (run down; it's clearly an older building), but the actual flat you will stay in is beautiful, modern, and very clean. The owner clearly takes good care of it, and I would absolutely stay there again.
Sidenote: The automatic / electronic warming toilet seat is also a very pleasant touch, haha!