They're actually quite useful when you really need them. My (stupid) coworker drove 200 miles on a flat one because she said she only trusted her dealer to change the tire. They held up. I feel it's one of those things when you get a flat in a dangerous place like the freeway, Liberty City, or a Waffle House parking lot, you'll be glad that you can stay mobile and not have to stop.
But yeah, for the other 99.98% of your driving life it will fucking suck