I used all of the TL community lots in the first custom world I made, except for the laundromat. If you use them, be aware the library has no skill books. You'll need to add a couple of the proper bookcases if you want your sims to read them at the library. Also, on the third floor where the toddler books are, there is nothing in the children's section for sims to put books on after they read them, so unless you put an end table in there, they will walk all the way to the other end of the third floor to put the books down after they've read them to their toddler.