Disclaimer: Please note that this review was written very soon after the Kickstarter backer units were shipped out and is thus based on the original manufacturing batch.
Easy as pie. Give it power, connect the HDMI cable, put batteries in the controller, and start the console. Then follow the basic on-screen instructions, and it's ready to use.
It's definitely lacking in games, but that's to be expected because it's new. It could use a little more organization, though, and the images seem to take a while to load. Downloading is simple and happens in the background.
Alright, this thing really could have used some more work.
It is very comfortable to hold in the hands, the analog sticks feel great.
The mouse touchpad seems decent enough for what it is.
The bumpers work well.
The face buttons can sometimes get stuck, and they feel like you have no idea when you have actually pressed the button enough for it to register.
The triggers feel quite cheap and are slightly unresponsive.
The controller lacks a pause button. Yes, something that's been trivial since the Atari 5200 is completely missing, and most of the games I tested could not be left to idle without losing progress (constant action, time limits, random events).
It's extremely laggy and can cause significant delay if used more than a few feet from the console. Commands occasionally drop, which especially causes trouble with the mouse. I'm guessing this is a combination of the Bluetooth (the radios and the software stack) and the processing.
I'm not going to go in details about specific games (as that's on the shoulders of the developers), but I will share some common issues I've noticed:
Graphics blitting is very choppy, meaning that sprites tend to appear and disappear at odd intervals.
The controller. See above.
High quality rendering is very choppy.
It feels a little too basic, but it gets the job done. No real complaints.
The time zone defaults to GMT, so that may need to be changed for anyone outside of the UK and other countries in that time zone.
The console info page says I'm running at 1920×1080, but my TV says the signal is 720p60. Downscaling, perhaps?
Do not put the console into airplane mode (on the advanced settings)! You will need to plug a wired mouse in to fix it.
Remember, it's still an Android device, so expect it to act like one. Press the power button, and it will put the system in sleep mode and turn off the screen. Press and hold for it to ask to turn off. You may be able to put .apk files on, but I have no idea and don't have the time to test now.