I have had this product for about a month now. As a funtional sprinkler, it works very well once you have sussed out how it works. The display card on which the product is fixed offers only basic instruction. You can set the horizontal spray angle for 90, 180, 270 or 360 degrees and the water jet to reach near or far and aything inbetween. it really is very good.
It appears to be well made being of all metal construction (inc. brass) with the exception of one vital part - the ground spike. This is made from an alloy and as such is quite brittle. To push the spike into a lawn that is anything other than soft is risking cracking, if not breaking the spike in two. My spike developed a crack the second time I pushed it into my lawn - in April while it was still relatively soft.
Had the spike been of stainless steel or even a quality painted coating on mild steel, I would probably give product a five star rating. With the spike being so delicate, its a disappointment. Pity.