I'm getting this for Christmas, but of course, I had to test it to make sure it worked on delivery. (Please tell my wife this if she asks!)
I got it working, and was able to engrave a metal business card before she made me put it away until Christmas.
Setup was incredibly easy - I expected a major assembly project, but it was literally unpack, attach the laser module, load up the software (I used AcmerTool on my Mac, I know that LaserGRBL and LightBurn are options, of course). Adjusted power levels, and it worked like a charm. I'm really impressed!
I'm a University instructor, teaching Computer Science, and in specific, embedded systems are my "thing". This is the best out-of-box experience I've had to date with this sort of equipment.
I look forward to making things with this unit, and to making some instructional videos about it.