This was a super interesting film & really managed to cover so much ground about the genre too: while it is about the 3rd-wave of ska-- it does a great job of both defining ska, while also quickly going over the origin of ska (especially with hitting on the fact that ska actually came before reggae) and summarizes the first movements: first wave (with quick mentions of Prince Buster, Laurel Aitken, etc.) & the two tone movement (the Specials, the Selecter, Madness, etc.) and then dives rather deeply into the 90's//3rd-wave of ska!
It was interesting that a notable figure within the genre narrates the film as well (Tim Armstrong-- founder of Hellcats Records, also member of Rancid, Operation Ivy, & other groups that also relate to the film). The film does a particularly great job of not only featuring bigger bands of the genre (Reel Big Fish, Save Ferris, Less Than Jake, the Interrupters, No Doubt-- whose first record//earlier years were spent as a ska group briefly-- and many others) but also features groups a bit more underground (Mephiskapheles, Suicide Machines, MU330, the O.C. Supertones, etc.) to give a very well rounded perspective from bands of different styles/tastes within the genre.
The film is very well loaded with excellent live footage and interviews-- not only do the interviews consist of the groups themselves, but also interviewed are prmoters, radio DJ, journalist/writers, too.
All in all, this film is really fun-- highly informative, and excellently covers the genre in a way that rather you are new to the music or a die-hard long time fan-- there will be something in it for you to enjoy no matter what!