The only delivered Gastroback not working. Thanks Amazon replacement arrived within 2 days. But this only worked with 4 welds, then was the end. What very annoying is the fact that between the individual and Vakuumierungvorgängen welds at least 2 minutes must always be maintained. Now I have decided on a significant high-grade, but of course more expensive device. Too bad, because of Gastroback 46011 Design Pro has a very nice design and would, if it works, have been sufficient for my needs.