I have travelled to London for extended stays (business and personal) extensively over the last 10 years. And with that experience, my stay here in Brentford (it borders Chiswick) was a very comfortable and convenient stay. I had previously avoided Brentford as "too far west", however I was wrong... I found the transport links into both Central and West London excellent.
The apartment itself was very modern, perfectly outfitted with new and high end appliances, under-floor heating not to be underestimated in winter. The furnishings were comfortable and neutral, and the apartment was very clean. It also had good light throughout - both natural and overhead, though when you throw open the curtains in the reception, you are looking directly into your neighbor's reception across the courtyard - so strategic curtain placement was necessary. The only other issue was the front door which sticks and requires a good "slam" to throw the locks. This sound carries in to the apartment so you hear your cross-the-hall neighbor coming/going. But other then that the apartment is SILENT and perfect.
A special note for the manager Ramona, who was top notch and made the difference. Very welcoming and careful to take me through the apartment and demonstrate all of the appliances etc. Whenever I had a question Ramona was a text and 6 min away! Definitely the best management experience I've had with a serviced apartment.