It is only a modest sprinkler with a good looking design.
I expected a sturdy metal no-nonsense sprinkler, which would work fine for my 10x5 lawn. I found this sprinkler to be of thin plastic, e.g. when the ring is tightened too much, it just jumps a thread.
The instruction how to set it up is missing. There are many ways this sprinkler can be adjusted, and with no easy way of knowing I set this up correctly, it is a bit of a gamble. Concepts of coverage and even spread are in your own hands, without guidance.
After experimenting with different angles for a while, the sprinkler appears to have quite a low coverage, with a diameter of no more than 8 meters (being generous), which covers less than 50m2. Compared to my old Vortex 2-in-1 sprinkler, this is equivalent to the "low coverage/ plenty water" setting.
I am now instead using the Hozelock HOZ2520 2520 Vortex 2-n-1 Sprinkler again.
I think I made one assumption too many based on picture and description and raving reviews.