I am a retired manufacturing engineer, and the machine seems to be made of top-quality components. Lots of stainless steel. No plastic tubing or piping. The door to the chamber is over an inch thick. The gasket to seal the door weighs almost 2 pounds. The chamber itself is made of stainless about 2mm thick (I only have inch calipers), not out of round anywhere that I can see, and beautifully welded. The valves and the cabinet are metal, and the wiring is skillfully done. The shelf unit is assembled with bolts, no spotwelds. The trays are fabricated from 1mm thick stainless, welded and ground at the corners and dead flat and uniform. Not stamped from a sheet of thin metal. I was a little concerned about noise from such a machine, but it's not noisy at all.
It came very securely packaged, banded to a wooden pallet. The only assembly required was connecting the wiring to the shelf unit, and it only goes together one way, so you can't get it wrong. And connecting the machine to the vacuum pump, but that was straightforward. It's quite heavy, and it was a 2-man job setting it on its bench.
It was almost plug and play for me to get started. The user interface is simple and informative. When I researched freeze driers, most reviews talked about how great customer service was helping to get a machine running. I have done almost 60 batches in the machine so far and not had a single alarm or malfunction, and haven't needed customer service for the smallest glitch.
It is a very impressive piece of equipment. The build quality is excellent. If you want to buy a freeze drier and plug it in and use it successfully the day it arrives, and use it successfully every day after, this is the machine to order.
I would say that the user manual could benefit from some work. Very tiny print. Such a costly machine could come with better documentation. But it contains the information I needed to operate the equipment.