The WOLF-Garten Scarifier is very stable, and the pendulum mechanism works well. the thatch is thoroughly eliminated; after winter 2012/13, the lawn had our added with schneelschimmel, orderly came out what. The turf is then badly pulled to pieces, but the turf is not destroyed. after a few weeks you can see nothing more of it (after applying soil and starter fertilizer). but: criterion of purchase decision should firstly be the size of the area that you want to edit. our 230 sqm looks probably too much, unless you want a few afternoons each year be employed. Sure, you can do less work thoroughly and deeply, but then it can also be his. You should also bring second force, or at least the will, in addition to the scarifying even muscle gaining weight. Conclusion: For small areas or a little or selectively matted grass very well. for all other: Electric Scarifier. some say by the way, scarifying is not necessary. To evaluate this, my experience but missing.