Sander arrived pktl as popular and well packaged. Have just renovations in the house, here are some to recreate at Rigipsplatte transitions because of tears. Spatulas with what you have at home just makes that pretty exhausting grind by hand, so I wanted an expensive device as it is not needed as often. Was nevertheless surprised that it was by four hours operation without problems. One has to get used to something it is not hard or scrub, then things are going well. However, the vacuum cleaner connection is not very good if you have a matching transition like it supposed to work, I have the tube with adhesive tape attached, which went not to. Had it indeed always wiedermal new glue but better than without working. Because of this shortcoming, there is deduction. As I said, I'm happy with it.