Does anyone have any experience of the CTR2 or its various iterations?

In case you've wondered what it is, it's something between a Flex Maestro and a FlexControl knob.
https://ctr2.lynovation.com/whats-a-ctr2-mini

You can use it standalone (which means you get some very basic controls, but a pandaptor is included) or hook it up to your PC.
You can also use the latest version with some Yaesu transceivers and such like.

Genuinely interested if anyone's tried it. Pile of crap or useful toy? At $140, even once you add in the tax and shipping, is cheaper than the £179.95 that Lynch want for a Flexcontrol (which does about 1/10 of this).