I've read about this series elsewhere and was always curious to see it. Thanks to an internet movie rental chain I've now seen 7 Up and 7 + 7, and the rest of the series is queued up and ready to ship. I can't wait.
Viewers who are not used to the various English accents will likely be struggling to understand what some of the kids are saying in the first movie, 7 Up, but it's a short film, and deserves repeated viewing. My vague memories of previous reviews of this series suggest that this may be the most lighthearted of the series. While it is fascinating for many reasons, it is also vastly enjoyable just for the experience of the 7 year-olds' high spirits and humor.
It's jarring when you get your first look at 7 + 7, which revisits most of the kids 7 years later. Their individuality, only hinted at in the first movie, is obvious in these now-14 year-olds. As a parent I feel that familiar combination of the sadness at the loss of the child and anticipation of the future adult. Here we run through this in a matter of minutes.
As it stands now, the series goes as far as 42 Up, somehow turning these frolicking little kids into my peers in the space of a few hours. (I've always been a sucker for special effects.) This series is unlike anything that came before it, and while a quick scan of titles suggests that it's been imitated since, I'm waiting to see what happens to this particular group.