> but I've never heard of them, possibly because they don't spend as much on marketing as lego
It’s a newer brand—they changed their name to it some time last year. But they seemed to spend a lot on advertising last Christmas—at least on YouTube, it seemed like tons of reviewers were talking about their sets. That’s how I found out about them, at any rate. And I’ll say—the one I got came together nicely, and looks great. The tons of lights are just, really neat.
> when I hear "lego knockoff" I think of the shitty ones, because I've never seen a Lego knockoff that wasn't shitty.
The cheap-o ones you get like at the dollar store, absolutely. But Chinese manufacturers have been making good quality knockoffs for a while. A decade at least? I bought my first knock-off technic set around 10 years ago, and it was 90% the quality of Lego at 25% the price. But the quality has only gotten better since, and is now totally on par with Lego. Admittedly, the price has gone up, too.