Roberts place is really a hidden gem. The views over Los Angeles are amazing and there are chairs on the deck so you can sit out and take it all in, not to mention that the Hollywood sign is literally just up the hill. The place is very spacious and is equipped with everything that you need, it's basically a little home from home.
Even though it is located up in the hills, it doesn't take too long to drive down and find cafes and diners for breakfast and there are plenty of them nearby also in the guest house, Robert has provided many leaflets and info brochures on local things to do and places to eat which were very handy. He has also drawn maps for local hikes and there are maps for farmers markets and restaurants that he recommends in the area.
I honestly couldn't fault it in any way. The guest house is really great and you should definitely book if you are staying in LA, you won't regret it.