I'm giving Harrah's 4 stars because of the fact my room was comped and that's always good. Join a players club to get comps, that's a little advice that most people know. So I got a free room BUT I ran into a few problems.
There are two towers at Harrah's: Carnival and Mardi Gras, with the latter closer to the Strip and unfortunately closer to the outdoor club that is on the ground floor. I know Vegas never sleeps and that is something that I shouldn't complain about. BUT I had a golf tournament the next day with a 7:30am tee time. And the noise and music coming from the nearby outdoor nightclub was extremely loud and it didn't stop until midnight. There was nothing in the room that deflected nor muffled the noise. And so it was a difficult night sleeping.
Second, my latest stay at Harrahs lacked the ability to attain Internet access. I have no idea how to get access: usually there's an Ethernet cable or wireless access. But I got nothing. Many of the new places have a table, study area available with plugs, jacks and cables waiting for people. And sometimes, once you open your Web browser, it directs you to the hotel page with the option to buy access for 24 hours. But that did not occur here. So that was difficult to live without the Internet for a few days.
As for the casino, it's fair and the restaurants are really wonderful there. There are not that many penny slots and it can get congested in there but they do the best with the limited space there. It's a great place to stay when you can get a room at Caesars, Venetian or Bellagio. It's in the middle of the Strip and it has quick access to everything. A very high recommendation from me.