We have the part ordered us together in a family with 3 parties and now also used in all 3 gardens. The ventilation function is already partially sufficient. In my garden, where I had scarify only last year with a loan unit, which has already passed. One wonders yet, how much more "kicked out" is. In the other gardens we scarify properly. Here must be at heavily matted surfaces once prepared the high setting and then brought out with a deeper adjustment of the rest. More does not pack the engine. For the price, it is a good device. Processing suits, though a lot of plastic, but everything is good. Construction will take about 20 minutes. The two different rolls are really changed very quickly. Would the member to buy again. Let's see how it is reflected in the long-term test ...