I don't allow my dogs to socialize with strange dogs so we never bothered with the bordetella vaccine until recently.
My Cocker pup is active in conformation shows so she was vaccinated, but we didn't think to vaccinate the rest of our dogs. Of course, she ends up bringing back a nasty strain from a show she had been to and she, the only dog that was vaccinated was completely fine while all the other dogs suffered to various degrees. My other spaniel who is still relatively young and very healthy only got a slight cough, but other than that was fine. My elderly terrier and the other dog, which is a brachycephalic breed, suffered greatly and had to get medication to help them through it.
If you have an older dog, a sickly dog, or a breed of dog that is brachycephalic I would recommend getting the vaccine. Seeing my two suffer through it as they did completely changed my mind about the vaccine.