The customer service was excellent, efficient and kind (he talked in ** with my wife). No complains about customer service, but about the service itself: I only had to contact customer service because the website registered my order twice (probably due to a technical glitch). So you send me 2 kaution contracts for the same apartment, what doesn't make any sense. You could have more QA to spot this obvious mistake from the beginning. Now I have to go through all the paper work to cancel it...