Billie and Max's place was perfect for our 1-night stay in London as we could walk to the office and the nearby Natural history museum and Science museum. The place was tidy and clean, and the little kitchen corner had all we needed to warm up some food and store some supplies in the little fridge.
It was on the 4th floor so just bear in mind if you have heavy suitcases (we did!)
We weren't too familiar with the Klevio app so it just took a while to figure that you had to swipe right to find the key and open the door but once figured, we had no problem accessing the place.
Overall, it was a nice stay and thanks Billie and Max for being very responsive throughout our stay :-)