Here's another video with considerably more information:
I see that on ebay right now (September, 2022) they're under $400 including shipping.
The Diamond version may be overbuilt since they are in the business of making things out of wood.
I haven't heard the squeel that you're talking about.I bought one and have only used it a couple of times thus far. The first thing I also noticed is that the balls spun only on one axis yet they seem to come out clean but I don't think the design is optimal I really wonder if one plane is getting way more cleaning action than the rest of the ball. It was supposed to come with cleaner fluid but due to shipping from china it didn't so I am using brillianize in it. I was bummed the fluid didn't come as it was advertised to have it included. The seller told me just "get something from the store" after the promotion said their fluid was the best thing since sliced bread. It spins way faster than I expected. I like that it's small and sits on my counter. It makes a high pitched squeel that hurts your ears if you are close to it but you can't hear it if you step away a bit. Does it clean better than my bucket machine with two buffers? Not really to be honest. $300 I paid shipped from China direct. I wanted to buy a diamond but there was no availability. I fully expect this to break down sooner than later.
It's a weird noise that just kind of gets in my ears if I stand over the thing once I start it. It's actually ear piercing and it's way loud the first cycle and barely noticeable when it reverses. If I back up a couple of steps it mostly goes away. It's coming out of the air vents on the sides.I haven't heard the squeel that you're talking about.
Depends on who you ask……I thought this was porn
What is his problem with it? I use mine all the time and it's great.Friend bought one of these for home use, let’s say not money well spent.