Looks interesting. Also looks like they took the spin-tub assembly from a twin tub and put it into its own cabinet. Plus the factor of having a window so you can keep an eye on the process. Looks to me like a lot of the compact washers currently being produced in Asia, so I'd bet it's being made there also.
What surprises me is that it doesn't come with a "spin mat" to be placed atop the load. This is necessary to prevent small articles such as socks from centrifuging out and getting caught between the spinner and the fixed tub assembly (ouch!). Perhaps it does have, but the seller didn't put the picture in there, or perhaps it got left out...? Whoever buys this should ask, and do their research.
Re. plastic construction: Some of the modern plastics are as strong as metal and possibly better because they're inherently rust-proof. Also, plastics keep the cost reasonable, not only manufacturing but shipping as well. There's a product in the USA called SpinX, which is at least partially stainless steel and is about twice the price of the Thompson unit. However I don't think it has the ability to run water into the drum whilst spinning.
This or something like it, could be the answer for all the folks who want to keep their TLs but don't want to run their tumble dryers for hours (i.e. reduces drying time by 50 - 75%). Also, when you do an extract rinse at that kind of speed, you use a fraction of the amount of water as in a regular rinse, and can thereby save one regular rinse cycle. This can be useful when using TLs that only rinse once, because in effect it gives you an additional rinse you wouldn't otherwise have.