Very nice place - I was in a ground floor flat.
The bed was a pull-out couch (which might not be for everyone, but was perfectly fine for me), and the flat had plenty of space across two rooms. I was very pleased that there was a washing machine within the flat, which is a life saver if you are staying for more than 1-2 days. There is a Tesco and Sainsbury (grocery stores) less than 5 minutes walk away, and it was also easy to get to the Thames for a morning run along the river.
I was in Chelsea on a work trip for 10 days, and this flat was perfect for my needs. I will definitely look to stay here on future trips.