Some of them do have decent components and function ok. The shifting is usually good. They tend to be more reliable than other department store brands. They are definitely not serious bikes, though. If you have one that you ride to work, class, etc., then you will think cycling is slow and laborious and will give it up. Spend the same amount you bought the Huffy for new and buy a used road bike on craigslist. It will make a world of difference.
They do make good presents for kids. They are nice-looking and have lots of fancy stuff on them and more gears than you can use. Not for anyone over the age of 12, though.
Dad: "It's a good thing he hasn't acquired a taste for real bikes yet."
Like the crappy bicycle of the same name, it gets the job done but that doesn't mean you enjoy it while it happens.