Pros:
The location was perfect, any and everything you need and want (food, one-stop-shops, the tube) is only a 10 minute walk.
The building was secure and we felt completely safe.
The Host was fast to respond to messages.
Cons:
Even with the boiler on, there was no hot water.
The fixture keeping the detachable shower head upright was broken and I had to secure it with several hair bands.
One of the window locks was broken; a windy day pushed it open and being unable to keep it shut, we were freezing.
Luckily we had English friends to teach us on the use of the boiler, washer/dryer unit, and variety of lock on the flat door, otherwise we would have struggled to operate them.