I would not recommend StarLines for their hop on hop off tours. I completed the Hollywood (red) and Santa Monica (yellow) tours. Half the time the drivers never actually stopped so you couldn’t get off the bus. You can’t get up while the bus is moving because it’s dangerous and the trees hang so low you would get hit by one if you did stand up while the bus was moving so it’s hard to get off if you’re up top. The audio is pre recorded which is fine but half the time it didn’t match up to where you actually were on the route so it was confusing.
Also, don’t rely on the shuttles to/from the hotels such as those in universal city. They supposedly run every hour but I never saw one despite waiting 1.5hours at the main number 1 stop for it. The driver wasn't able to be contacted and when I phoned dispatch to see if it was coming they said they’d ‘phone me back’. I’m still waiting for that phone call.