I am staying 3 nights in Hollywood (arrival half day + USH full day + Hollywood Blvd full day touring), and I have purchased the Hollywood City Pass for touring Hollywood. Since I have no car, I will stay on Hollywood Blvd rather than touring LA downtown or Farmer's Market or the Beach areas. Maybe another time in the future. If you can use up all 4 vouchers, the city pass is a good deal.
We will be staying in LA at Hilton Universal and we are doing this tour. It has really good reviews and looks like it goes to all the spots we want to visit. It is a good price too. It also picks you up at your hotel. We are going to be in LA July 12 - 15 so if before your trip will let you know what we thought of it.