We stayed for 28 days over July/August. The Pros and Cons seem the same size, but there we only two Cons and a lot of Pros. We find it better to explain why we considered them cons.
Pros - Wifi was reliable and strong. All appliances worked great, especially the Washing Machine. Location was great, although if I was staying for just a few days, I would probably stay further west, but the multitude of Underground Stations, proximity to DLR at Bank, buses and being so close to the Thames was perfect for a long trip to see all areas in and around London. Size of the unit felt huge. There was a large bedroom, a full kitchen, good sized living room and a balcony to boot. Communication was handled quickly. Check-in and check-out was easy.
Cons - Place could use a little TLC. Pictures shown on the listing are accurate, but are probably from a little while ago. This wasn't an issue for us at all, but it should be noted. No air conditioning. This was clearly stated when we booked the Unit and we were well aware, but if you are going to be staying in the middle of the summer, especially during record breaking heat, like we did, you need to be sure that you will be happy with that. That said, we bought a decent sized fan for the bedroom and the owner offered (we did not ask, Helen offered) to reimburse us, which was very nice.
In summary, if we are going to do a long term stay, we would book the Unit again. Thank you Helen for everything.