CL is one of the better EPs. The apartments add realism to the game, and makes playing a household feel less isolated. Paying rent, having building restrictions, neighbor problems, etc. adds to the realness. The festivals and collectibles (well the posters) are great too. Plus there’s social media, if your sim enters that career or has high Charisma. If you have other EPs/GPs, the community lots in the neighborhoods can easily be swapped out for restaurants, spas, and stores.
I like a variety of worlds, and CL gives me an urban landscape I wouldn’t be able to find elsewhere.