We used this bus almost exclusively after buying a multi-day ticket from their booth on Santa Monica Pier - although, despite buying it there we didn't actually use the Yellow Route except to get from off Rodeo Drive to our hotel!
A bit run down, I'd expected a better standard given that we were in LA, to be honest... but it's a bus. You sit on it and get driven around... not much needed! Free headphones when you get on and you just plug yourself in and enjoy the oddly accented commentary! My favourite bit is the part about the Stinking Rose... got me every time!
We almost exclusively used the Red Route - it was nearly a three mile walk from our hotel to the first stop, and we did get lost when we first tried to find it! It's OFF the main road, tucked away on a side street with a very small sign! We did ask the drivers why it was down there, and they said they used to stop on the main road but the residents complained. It's an upscale area though and we didn't see any problem with where it was (once we found it).
If you own or manage City Sightseeing Los Angeles, register now for free tools to enhance your listing, attract new reviews, and respond to reviewers.