Overall we were very happy with our stay. We needed a month long stay as we were having some emergency works done on our flat so we had to move a lot of stuff in on arrival - thankfully, we were assisted by a friend of Ben's which made a huge difference, particularly as my partner was 33 weeks pregnant when we arrived.
The place is very clean and tidy and the location is excellent. There's bus routes within a few minutes walk and Elephant and Castle station is a 10 minute walk. There's also a fantastic range of local restaurants and bars, particularly in the new development at Elephant Park which is well worth a visit.
My only feedback would be that the photos used in the advert did not reflect the property that we stayed in. I guess that Ben manages a number of properties within the development and so the photos used summarise the various places available. However, personally, I would have preferred if the photos represented just the place we were staying. Moreover, there was no rooftop available - at least not in the building that we stayed in. Finally, there was very little in the way of kitchen utensils and cookware. We had to buy our own mugs and stock up on our own homeware for cooking. If you're only staying for a few nights then you'll be absolutely fine but for a longer stay you'll need to ensure you have what you need for cooking at home.
Still, overall very happy with our stay and would definitely recommend