I recommend Tony !
We went here for a weekend and it was a great experience.
About outside :
We cannot say that it's located in an ideal place.
It's in South London (more exactly "Peckham" in the "Southwark" borough), so it's not the richest area, but we never felt unsafe at any time.
This place is very accessible using public transport (for example, when you're at Elephant & Castle, you have not less than 5 different bus lines that can lead you to Peckham Park Road !)
A big supermarket (Asda) is not so far away if you need some food.
About inside :
When you cross the door of Tony's appartment, it's totally another atmosphear than outside.
A lot of lights (Tony loves the lights !), good laidback music, you feel immediately like in a warm, comfortable place.
There are 3 rooms, 1 for Tony and 2 being rent for Airbnb. Each is securedly locked. The kitchen, bathroom and toilets are shared.
There is a fridge in the kitchen for Tony but there's another private fridge in the room.
A small TV is available, and you have an access to Wi-Fi as well.
The room we were in was great, very comfortable, good bed.
The only downside is the balcony that was a bit messy, but Tony said it was because he hadn't time to clean up and that was not such big a deal anyway.
About Tony :
Tony is VERY helpful.
His two favorite sentences are "Hey, are you okay ?" and "Do you need something ?".
His purpose is that you feel the greatest he can.
And he's always looking for ways to improve his appartment (new lights, new secured locks, etc.).
He promised us that if we come back (and we'll sure do when we'll come back to London), it will be better than the previous time.
In summary, if you want to visit London, I just don't think you can find a greater place to be for such a cheap price !