Coworking spaces are great, but good coworking spaces are hard to find. I toured and worked from every coworking space I could find in Portland before settling at the one I presently work out of. I'm happy with it, but not thrilled; I've talked to other Portlanders about doing something better.
Point being: do your research. Many coworking spaces do "day passes", or if you know someone who works from or runs a space, ask if you can work there for a day for free. Everyone has different sensitivities to noise levels, the ergonomics of the work furniture provided, and so forth. Not every space is going to work for everyone.
It is a big cost saver, though. Even in a cheap city like Portland, getting decent office space and everything that has to go with it would be a helluva lot more than I pay to work from a coworking space.