Marina’s house is exactly as described and in a lovely part of town. I read several posts about the location so let me be clear.
We came for several months with our 10 month old infant. We would walk to portobello street every morning for brunch or coffee (Bluebelles... I highly recommend them) to start our day. It is not at all far, and takes you past some lovely spots once you learn your way off the main roads.
Ladbroke Grove is a wonderful diverse community and we enjoyed interacting with our neighbours. Notting Hill is indeed a bit more of a walk, but we did this often with our baby and well within reach. The weekend portabello market stretch from Ladbroke to Notting Hill is a delight for the senses with amazing food options, and excellent merchandise from cultures across the globe.
There are also parks around, and public transit is quite accessible. I will note, that because of COVID-19 concerns, we avoided public transit, and either rented a car for longer trips (easy to park on the street using the app the city suggests) or used the Gett app to hail a black cab.
The house was spotless and very well set up for living. Comfy and warm when it gets colder, and airy and cool on hot days. Be ready for some creaky floors upstairs if you are looking to sneak around at night, but it only adds to the charm. The bath tub is also a delight at the end of a long day. The kitchen is well stocked and we cooked often.
Marina herself is extremely responsive and helped us out with needs like a crib and high chair, and when we did have some issues, she sent out her handyman to address them immediately.
If you are looking for a spot in London that is a walk away from anything you need, away from the chaos, and yet close enough to get it all the sights... all the while feeling like “home”. This is your spot.