I ordered two of these lower beds. The first was broken after 13 months. The second after 15. That may no longer be a coincidence, is probably due to the poor quality of the manufacturer. Then at the service hotline of the company. Medisana called with the result that I can bear the return charges itself after more than six months, as referred to by the company. Medisana on the burden of proof in the warranty law. So anything with customer service, particularly since it obviously is a known defect. Conclusion: better to spend a little more money and buy a good Had Munter bed (the latter has 6 years raised). Saves Nerbven and protects mainly the environment (... by avoiding waste and unnecessary transport).