First impression is this thing is going to be a welcome addition to my travel schedule. It's incredibly small (about the size of my iPhone 7 Plus, but thicker of course) and it's very lightweight. In fact, I worry about this thing falling off a night stand. When everything is packaged in the travel case, it's still very light -- much lighter than my AirSense 10. It's very quiet (about the same as my AirSense 10). The mask seems to make more noise than the machine does.
It requires a special mask that accommodates the humidifier filter. They have the HumidX and HumidX Plus filters. The plus filters are for low humidity/high altitude environments. Regular is for medium to high humidity environments.
Setting up was easy. It came preconfigured, but I tinkered with the settings a bit as my prescription is old and I've used SleepyHead data to fine tune things. You have to download an iOS/Android app to set it up. I had already downloaded the app and accepted the terms, which meant I had to delete and reinstall it. When you first open the app, you hold down the ResMed and Mini icons for 3 seconds. It then enters into clinician mode and you accept the terms. After you make your adjustments, you exit out. From there it goes to the regular Mini app menu. I'm not sure how to get back to the clinician menu without deleting the app first. I'm sure there is a better way, but I haven't found it yet.
Below are photos:

ResMed Air Mini with the P10 mask (I purchased an extra)

Travel Case

Unboxing

Not much bigger than an LED night light

Soft case that comes with it

Power adapter (no brick, just a large plug)

Instructions from the P10 mask kit

HumidX and HumidX Plus filters

HumidX filter in the hose

All connected

Clinician menu

Video (for amount of noise)