Lara's home is good value for money. I will recommend for backpackers or budget travelers. Taking bus is easy with TFL/Citymapper and you can discover more about London on the bus (no. 78 is my favourite line).
I have only met Lara's mum who kindly allow early check in (0930!) for me, and Lara at a glance - she is really busy!
If you are a runner like me, there are two routes that I have tried: a return to/from London Bridge and Tower Bridge, past the peaceful Burgess Park, around 10km in distance. The other route is even better from my experience, a go to to the Greenwich Observatory, and there is a little tunnel getting past the Thames!