A good show for responsible teens and tweens.
There is a lot of drinking, smoking, bikini-clad women, and some violence and swearing. However, I think it's a good show over all.
The characters *do* break some laws (such as stealing cars and setting up explosions), but it's similar to Batman or Spiderman. Vigilantism is illegal, and the superheroes do some damage in the course of their fights. The team rarely ever kills the bad guys, generally preferring to put them in jail or lightly injure them. They often help people in trouble, not unlike Angel. The swearing, violence, and other negatives are pretty tame compared to the majority of spy shows. Fiona is a fun, strong female character with an affinity for explosives. It's just a fun series that I'd rate PG or PG-13 if it were a movie. Mature kids have probably seen worse in their video games or movies.
What other families should know
Too much violence
Too much sex
Too much swearing
Too much drinking/drugs/smoking
Great role models