This apartment on the 4th floor and was an excellent location for us. It is spacious- especially for London. Helen and Jack were very helpful on the phone prior to my arrival. The details for arrival are only sent 24hours before you are due to stay. Check in and out is very easy and security is good.
It is a very basic apartment, the kitchen has all appliances however is short on some basics such as tea towel, washing up liquid and oven mits. The glasses were also a bit random. This may not bother you as most people eat out the whole time in London.
I come from the country and found it particularly difficult to sleep as the tube works from 6am on the dot (no need for an alarm) to 12am and every two minutes a train goes through. The apartment is noisy even on the 4th floor. Again, this may not bother most people.
There is a sofa bed so you can get an extra person in if required.