Perfect location for Hammersmith, great neighbourhood, very safe street. The apartment is beautiful, and the pricing is inline with Premier inn in the area. I was in London for work, and so you can't go wrong but choose this apartment (especially over a hotel). It;s every bit as beautiful as it is in the pictures.
I've read about others saying the stairs are too much.. This is a bit silly. There's obviously not going to be a lift/elevator, and the whole of London is townhouses. If you need a lift, you're gonna have to stay in a hotel.
The hosts even left water and snacks in the fridge, which was a great touch meaning I didn't have to go to a shop just for a bottle of water. This made the experience special too, as I felt like I had a free mini-bar!!
Overall, there's nothing which can be improved here - I'd even take my wife here for a special city break and it would be perfect!