Just had a 6 nights stay at Max & Billie's studio!
Price-quality is good, also considering the great studio location in the city (Notting Hill Gate).
The studio corresponds well to the photos and the app for keyless entry is excellent!
Max & Billie also provided luggage storage support on checkin/checkout day, which is of a great help. Their communication is also optimum (clear and fast-responding).
The bathroom of the studio is definitely up to 4 star hotels level.
The bed was nice but the ceiling at bed level was very low (as stated in previous reviews and photos).
Some additional little things/equipment could be added but these are things easy to improve.
Overall, I can definitely recommend staying with Max & Billie and will not hesitate to stay with them again.
Bruno