The location is very central, you are at walking distance of the Warren Street subway station, which is at the intersection of two of the most used tube lines in London. You need to pass three doors with three different passcodes to get to the room. The room is small and clean, with a comfortable bed and a small table with a chair. There is also a convenient mini-fridge but no kitchen or microwave. The shower is shared, it is clean, has a large shower head and enough hot water.
You can hear the neighbor quite clearly if they speak. The window is far from being sound-proof and you hear the street all night. Fortunately, earplugs are provided. The wifi often suddenly stops in the evening when - I suppose - other residents start to use it. It turns back on 10m to 30m later, but might stop again later. The owner was not very responsive by message about that issue.
With all that taken into account, I think the quality is fair for the price.