The Great Part
All in all, you can expect a comfortable apartment with great transit access. It's in a nice neighborhood; quiet and residential but within easy (for anyone without mobility issues) walking distance to restaurants, a tube/overground station and bus lines. Tina was great about answering questions.
The Not Great Part
The cleaniness of the apartment didn't quite meet my expectations. The cleaning service that they work with doesn't do a thorough job (e.g. things like cleaning the microwave, mopping the floors, cleaning the carpet). It's a lower ground floor flat accessible by maybe 9 or 10 steep stairs. If I'd known in advance I probably would've tried to find another place because my mom already walks with a cane and then we had to get our heavy luggage down the stairs upon arrival and up the stairs for our departure. We managed, but it caught me off guard. The check in process is also inconvenient. We took a taxi to the check in office, spent maybe 20 minutes there and then had to hire another taxi to get to the flat.