This scarifier is the best I've used so far. I find this even better than a gasoline model, let alone the huge price difference! Fan and scarifier in a, top price-performance ratio, I would recommend this product only. Collection bag is for the birds, but is not on the scarifier, since one with a rake is much faster in an area of 700m2, because otherwise all 10m must empty the collection bag. The collection bag is working properly, but is just too small - for me but not a problem.