In my old garden, I had several pop-up sprinklers (T100). The running quite reliable and also kept long as you were careful with the lawnmower. Now that I have a new garden, a beautiful rectangular area for this Regner offered. At first I was amazed about the size. Since you have already digging something to bury him. But one has a spade. :-) The adjustment possibilities are manifold. Can be set: - The total flow volume (explosive strength) - (Each page individually) the inclination to the longitudinal sides - (Each page individually) the tendency towards the short sides In the manual I did not have to look for it. Easy lid and pull sprinkler. Then one comes close to all "adjuster". I can not confirm that the sprinkler after einbuddeln had problems with silted nozzles. I have after burial simply tipped some water through the sprinkler. Gardena is there actually from always solid quality. Enterprises on line I take the Oscillating Sprinkler even cheaper compared to 4 circular sprinkler. And I also have saved the installation of additional irrigation pipe.