Ok, so I finally checked out this program, and I really like the looks of it.
Here's what appeals to me: I like that it explains prealgebra & algebra conceptually - but it seems to be less wordy (and, frankly, less difficult) than AoPS while still focusing on problem-solving, puzzles, and what math is really all about, rather than on memorizing & copying algorithms. I like that it's based on Jacobs (I really like Jacobs) and that it has humor and interesting puzzles like Jacobs, but a more approachable scope-and-sequence for a youngster. I like that it's a connected narrative, which is great for my highly verbal kids, but it seems to be less goofy and more coherent than LOF (which is starting to get on my nerves).
Anyway, I'm wondering if anyone who has been using it for a bit can tell me their impressions so far?
In particular, I'd love to hear how it compares to other similar things - like AoPS PreA, Zaccaro, LOF (or anything else you think it's similar to).