The great location is right near Victoria Station and St. James's Park. The living room does look out onto a busy, noisy street, but the bedroom is in the back of the flat and is quiet. Considering the location, this was a pretty quiet flat. If you're sensitive to light, I'd recommend bringing a sleep mask as the curtains are a tad thin.
The check in/out processes were so smooth and easy. And the hosts (I was communicating with Roxana) were really responsive. This was a lovely flat to stay in!