I have the equipment for a few days and am very happy with it. Only the pot is a bit too small. But the problem have all devices in this class. Had to each track the basket empty. On the other hand you scarify even, usually, 2x a year. I can say nothing about the airing. The scarifying works great in any case. Unbelievable what the scarifier everything rausholt. Would buy the AL-KO at any time. Easy handling, easy to clean and compact to store. For this purpose a modern outfit, wass more could you want. The engine has a good pulling power.