I have only one experience with a WeWork. It was in Hollywood, and that was only for a 2-day seminar held there. The AC died the first day, and it was unbearably hot, but they got it sorted by day two.
Co-working spaces in general, however, are beneficial to start up founders. It's relatively low overhead for office space, that comes complete with conference and meeting rooms, and yes, a community that is for the most part in the same boat as you, starting up their companies. Kindred spirits. I agree with Eric and Igor that this community is great as sounding boards and early adopters. Additionally, you will get the benefit of learning from their mistakes as they will learn from yours, and can even work together to find solutions that will help many. That 'water coolor' factor is valuable and very important.