Well, I bought my first computer (TRS-80) in 1979, first laptop in 1990, and I've had lots of different computers. MS-DOS, nearly every version of Windows, Linux versions since 1995, never a Mac OS but I got an iPad last year. Right now I have one Windows laptop, one dual boot Windows/Linux laptop (mostly Linux), a Raspberry Pi running Raspbian Linux, the iPad, and the Pixelbook.
I got the Pixelbook on sort of a lark, on sale for $699 back in November 2018. The hardware is 8GB, Core i5 processor, 128GB ssd, 2.4 pounds, beautiful 2400x1600 (that's 3 by 2) touch-screen display, high quality construction, excellent keyboard and trackpad. 10 hours battery life. And fanless. (Also 2-in-1 form factor, flips around for use as tablet.) I didn't expect it to become my main computer, but it has.
Complex? Well, I don't know about that, but they do say the mark of a good product is that it makes complex things seem simple. Or something like that. That's what I'd say, anyway, about the Pixelbook. Best machine I've ever owned. I'd rather be running full Linux with i3 window manager, but it's not worth switching (and giving up instant boot and higher security of Chromeos).
I don't think I'd recommend Pixelbook/Crostini if you're heavily into x-window apps on Linux. I rarely use them; I'm mostly just on the console/terminal and it works well. I've tried Firefox in Crostini, works fine, but it's not as snappy as Chrome.
RE: Google. I'm not a fan of Google, so have to get past that when liking the Pixelbook. And it seems Google is not very good at supporting their hardware. Fortunately, I haven't had anything go wrong. At some point I will want to upgrade to a more powerful machine, I expect. Light weight (the closer to 2 lbs the better), good battery life, and fanless operation are important to me, and I'm not sure there's any machine out there that I'd pick over the Pixelbook right now. At least not for a reasonable cost. Pretty amazing given that Pixelbook came out in 2017 and I paid only $699 for it.