Okay I have finally jumped in on this and have purchased 1 "Full" controller and 3 standards on the way.
I know I am way late to the game with these however from the reviews I have seen I'm pretty excited about getting these going.
Not to mention that I really love the ability to help secure the network further by adding a full node to the BTC network.
Also, incredibly optimistic that the next release will allow solo mining to the node itself.

UPDATE 5/18/2022:
The "Full" controller came in today and within about 10 minutes I was up, running, mining and downloading the blockchain.
Easy setup which is very intuitive however not sure the web interface password changes the OS password. This would be something I would change.
Really digging the interface but
would love to see a "Block Found" stat on the mining gui. That would be a welcome addition.
So far I like everything I see and must say well done!