I hesitated for a long time to purchase the Gardena ZoomMaxx mostly because I could not find details about how small of an area i could water with it. DO NOT HESITATE! This thing goes down to "tiny" !!!!
There are so many ways to adjust this sprinkler and that helps immensely:
there are two tabs to adjust each side of the width of the water flow (the "wave")
there are two knobs to adjust the point at which the wave will stop and then oscillate to the other side
there is a knob to adjust the pressure of the flow. This keeps the sprinkler oscillating and also adjusts the height of the wave.
the sprinkler head rotates. I love this feature. So much more flexibility in where I can set the sprinkler.
It all sounds like a lot but it's super easy to use. The spike is sturdy and raises the sprinkler head above the ground a bit. Just poke the sprinkler in the ground, rotate the head in any direction, and get watering!