Well, it's been a while. I finished this series back in December of '08, and I'm just now coming back to tell y'all:
lonelygirl15 has a good concept. (I won't comment on the controversy over presenting it as a real blog at first.) It has a slow beginning, properly picks up about... seventy-odd videos in, and carries on from there, all the while attempting to make the series seem "
real". It sometimes succeeds, too. The actors are certainly capable, and they do their best to sell it.
Unfortunately, this is a mixed bag. During stretches when it pulls off the "real" feel fairly well, this tends to manifest in a very slow plot, without enough character development or video-to-video entertainment to tide it over. Then the problems start to pile up, from little things like
Technicolor Science and unconvincing writing, to inconsistencies and clear signs that the writers really don't have their world or story planned out nearly as well as they thought.
By the end,
lonelygirl15 devolves into a confused tangle of forgotten plot threads, unanswered questions, and a climactic story arc that mostly raises more questions and sets up for
lg15: the resistance, which at last count, answered few if any of the aforementioned questions and ended on a full-blown cliffhanger.
Recommendation: Skip it. If you do decide to watch it, cut off your viewing experience at either 1. the end of the first season, or 2. the LaRezisto arc, which is about halfway through the second season. Between them, that's as much of an ending as you're going to get. (And they
derail Taylor, which she never quite recovers from. I liked Taylor.)
If you feel like more vlog-opera, you may want to try the spinoff series
KateModern. Based on the thirty or so videos I've seen, its individual videos are more entertaining, the pace is relatively brisk, and according to fan testimony, it's more internally consistent (the finale does its darnedest to tie up every plot thread of the series and nearly succeeds) and... better. Going second might have had something to do with it.
But, then, you might just want to skip it altogether.