This was our first experience with AirBnB and it was a good one. The location of Notting Hill was recommended by friends as a hip part of town, and they were right. If you are there for the weekend, Portabello Road Market is a great way to spend a relaxing day and enjoy fantastic food from the street vendors. It's only a 5-10 minute walk from the apartment.
The apartment is small as you would expect in London, but had everything we could need or want. Also a much better environment than a sterile hotel.
1 block away is Haminados La Boutika which is a nice bakery that offers meals for all times of day. It is run by "Joseph" and we looked forward to our morning conversations over coffee with him. There is a great corners store and laundromat right next to the bakery so you have everything you could need very close by. If you travel the opposite direction you will find a very trendy pub called the Westbourne which had a young crowd with great food. It would be easy for a young group with no kids to lose an evening there.
Transportation was also very easy as others have mentioned, but it wasn't until our last couple of days that we realized walking was a good option and a great way to see the neighbourhood. We accidentally found Kensington Palace one evening on a walk home! (Will and Kate did not invite us in, however). Travelling as a family with teenagers, it probably would have been less expensive to use Uber than to use the bus and the Tube, but they were convenient. Rome2Rio is a great travel app.
Last but not least, Larry was a great host. We accidentally locked our key in the apartment one night and ended up having a glass of wine at La Boutika (purchased from the convenience store next door) while we waited only 30 minutes for Larry to show up with a spare key. He was very kind and friendly.