TLDR: we wouldn't hesitate to book this flat again. It's nice, clean, and conveniently located.
We loved staying here! We didn't want to be in a noisy area but we did want to be close to a convenient tube line. 3 different lines run through Notting Hill Gate and the street which we were on was very quiet. We were around the corner from a bakery/coffee shop (Paul Rhodes) and we were close to many other shops as well. Portobello Road is a quick jog but most other tourist attractions are just a few stops on the tube line.
The apartment itself is lovely! The bed was comfortable (even with two tall people) and we made use of the fridge & microwave while we were there. The bathroom was clean and beautifully remodeled as well. This flat is downstairs from the entry but close to the laundry closet and the window leads to the patio. It was much too cold for us to make use of the patio but it would've been lovely!
Thanks Max & Billie!