The flat is very small and there are three rooms one if which we (two adults) rented for two nights. Easy communication, friendly staff. The booking procedure was adequate.
However our room was small, very simply furnished and not very comfortably equipped. Bright ceiling light but no bed light. Tiny bathroom which had to be shared by at least two parties. High chance of disturbances by other people (eg one party came late at night). Furthermore our bed was way too narrow for two adults (but the room was meant to host two people) which made the nights extremely umcomfortable.
In conclusion the place is a very low standart accommodation (more like a student hostel) and the money-value ratio is (even for London) not good. The night before we stayed in a simple hotel which was nicer, had a bathroom in the room and included breakfast (for the same price).
So unfortunately I cannot recommend this place unless you just want a bed under a roof and no comfort at all.