Haven't put it through it's full paces yet, but I engraved an acrylic night light for my niece and did some trial cuts through 1.5mm plywood. For the price, you can't beat it. I did all engraving with LaserGRBL, which is freeware.
It would occasionally freeze with the laser on when starting a job so I always refreshed before starting a new job and it worked like a charm.
Advice if engraving acrylic - I used a piece of colored posterboard (I had some red from dollar tree) under the acrylic that I focused the laser on. Aufero recommended 100% power at 3000 mm/min, but there were occasional cavitation bubbles that would form in the middle. After some test runs, I found that everything worked best for me at 42% maximum power and 4000 mm/min.
Note that the max size for engraving is only about 7"x7" with this machine, but it does exactly what I wanted to do for an outstanding price.