Tatiana was a great host, she made sure we knew where to go and was very accommodating with our crazy travel schedule. She also messaged to make sure we found the umbrellas the day that it rained. She also had Oyster cards available to use.
The flat was clean and comfortable. It was a little hot because we were there when the weather was particularly warm, but it cooled off very fast when we opened the windows and back door. It was within a 10 minute walk of three different tube stops.
One thing to note is that the apartment does not have wifi. She left a SIM card to use, so if you can use that then you are all set. Our cellphones already had service so we didn't need it and we were not able to use our iPad that is not 3G enabled. It wasn't a huge deal, but worth noting.