I've had one UTI in my lifetime so far, and I hope I never have another. It was serious enough to cause bleeding, and the pain...wow.
If not treated, UTIs can move up the urinary tract to the kidneys, so prompt medical attention is vital, like the article says.
There have been a couple of times when I've had slight symptoms of a recurrence. Cranberry supplements, in capsule form, took care of the problem---and lots of water. The supplements are even better than the cranberry juice, which has sugar that can actually exacerbate an infection.