I have had no issues with the freeze dryer itself, but the information included regarding the care, setup and oil changes is certainly lacking and inadequate. For such an expensive machine, I'd expect a well thought out booklet/owners manual to be included. What has arrived with the machine is a pile of random papers, many with conflicting information. The "booklet" has numerous spelling errors and appears to have been written by someone who doesn't speak English well. Was it translated??? This really is lacking and needs correction!!