The delivery was very quick. Unpacking and leveling, since it needs no operating instructions, very simple. The device was not working. Well, but unpack the operating instructions only, I find no fault. Because I wanted to grab a Retoura not equal, I chose the telephone number of the seller, he tried to help me on the phone, I just old blind hen just could not be right. Mr. M. he assured would send me a service. Said and done the customer service meldetet 45 minutes later at me and said I should shove times the fixed charge. Fits worked, the thing is running and sip the water from the walls like nothing. Only, sleep, ne no chance it hums powerfully loud. Because I've read all recessions, I read that no peace and I called back the company at times and held the phone to the device. When asked if the noise was in order, I got the answer "No, no way. You will immediately receive a new device sent" Done in turn said, 2 days later there was a new device in my house that works very quietly and orderly. The service I can recommend to anyone! Topp company! class goods! five stars! Thank you so much.