The location of the unit was great. Close to the tube and close to Central London. The key pick up and drop off was a minor inconvenience though.
The only downside was that the unit was very dusty when we first got there and we had to do a little cleaning up ourselves. Also two of the door handles to utility closets were falling apart. Lastly the washing machine worked fine but I noticed that a compartment where you put detergent was not working properly as it was not properly feeding into the machine. As a result, I put detergent directly on our clothing and did not use the dispenser.
Overall the unit was comfortable with a great quiet location.