Some of my initial impressions, in vague chronological order:
- Good lord this thing is a fingerprint magnet.
- For a cheap laptop, it seems pretty well-built.  There's a bit of flex on the keyboard, but overall I feel like I'm using a much better machine than the original Pinebook.  Which I am.
- I really, REALLY like the splash screen as the machine boots.  Like a lot.  Well done to whomever designed that.
- Speaking of the screen, it looks NICE.  It's matte.  It's 1080p.  It has small bezels.  It's....nice.
- I had coil whine on the very first initial startup.  It happened once I logged into the machine the first time, and lasted only a second or two while the CPU was at maximum frequency.  It has not happened since, but I also haven't maxed out the CPU since either.
- No wifi hardware was found at first run.  At first I was concerned, but then I remembered the firmware-based privacy switches.  Enabled the hardware, rebooted, and wifi worked as expected.
- Initial update (button in bottom right) operated without issue
- Saw hexchat on the desktop, and it was preloaded with the pine64 server.  Nice touch.  Found it slightly silly that it didn't default to the pinebook channel, but whatever.
- Trackpad definitely has a sluggish feel to it; this is a known issue and updated firmware is already being developed.
- Uninstalled chromium, installed firefox-esr.  Crashes without ever showing a gui.  Removed firefox-esr and reinstalled chromium.  Crashes without ever showing a gui.  I don't have a browser now.  Oops.
--- Stupidly did that^ before testing YouTube, so I can't comment on either video playback or speaker quality yet.
- Poked the eMMC drive.  It is TINY!  It doesn't sit flush against the board when attached by default, so I can see how some got shaken off during shipping.  It's surprising that it happened, but I can see how it happened.
- Nvme was a bit of an adventure.  To avoid duplicating posts, I'll simply 
link to my post here.
Next steps for me are to set up a distro (probably debian?) on the nvme drive to use eMMC as /boot and /mnt/data/primary, and the microSD card as /mnt/data/secondary.  Ideally FDE.
Overall impression: This thing is gonna be a cool toy at worst, and a useful tool at best.  There are a few minor issues that have various workarounds, but overall I can see this being a daily driver, or if not, a secondary machine that travels well.