I think it's a very good acquisition - I've been wondering about this device for a long time myself.
But only theoretically, because I'm good at sharpening by hand, it would be throwing money away.
By the way, I looked around the Forum here to see if the name of American designer and entrepreneur from the nineteenth century appeared here - namely Ichabod Washbourn.
I didn't find it - and I was surprised
He is an amazing guy who over 150 years ago developed an ingenious method of sharpening twist drill bits and a sharpener that perfectly implemented his idea.
In my opinion, to this day no one has developed a better method, none gives better results in the matter of sharpening twist drill bits - and this is a complicated matter. Flawless sharpening of a drill bit is very difficult - every workshop owner knows that.
The sharpener you bought comes very close to the Washbourne method, although it does not fully implement it - but the drill bits sharpened with its help work very well.
I'm posting a .pdf file with a description Washbourne method here, unfortunately in Polish - I don't have an English version (additionally, pictures).
It would be very difficult for me to translate this - it's specific vocabulary, geometry, etc.
But even the drawings say and explain a lot.
PS: I found an English forum where they discuss it - and there are some images with English descriptions:
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