I highly recommend Cathy's apartment to anyone visiting London. My boyfriend and I were very comfortable and had everything we needed. The apartment is exactly as advertised, very clean, and well located. There is a bus stop about 2 minutes on foot from the apartment that is well connected to almost anywhere downtown. We were pleasantly surprised by how easy it was to get basically anywhere from there. As described, there is a train track right beside the apartment but Cathy is absolutely right in that the windows do a really good job keeping the noise level down and we weren't bothered by the trains during the night one bit. Cathy is a fantastic host. We unfortunately didn't get to meet in person but she arranged everything for us from check-in to check-out. We were very impressed by her communication with us to ensure that everything went smoothly. She was also extremely helpful with narrowing down the endless possibilities when it comes to things to eat/drink/see/do in London and all of her tips (or at least the ones we managed to get to) were hits for us.