I've not used that specific application before, no. But it does look interesting. I'd surely want to try it before committing to a purchase.
The scanners used here are from Epson, Nikon and Minolta, and Silverfast is the software of choice. Or the Epson software for the Epson scanners. And the the monitors are calibrated with Spyder or other X-Rite squids. That tends to be a fairly common professional solution, outside of a drum scanner workflow.
In some ways, this CLScan almost appears to be more like a developer toolkit than an end-user application. And that could be useful.
I would point this out:
(1) It does seem a bit pricey.
(2) And the site/company is new: COMMANDLINESCANNING.COM created on: 05-Jul-12, expires 05-Jul-13
And then the site/business is run from Croatia...
... which I happen to see is also your IP address.
So your post is likely spam. But it's an interesting project, so you get a one-time pass on it.
But I always get a bit uneasy when I see
(1) a new online business,
(2) that didn't spend any funds on it's branding or public presence; the site is using a $15 or $35 website template from
ThemeForest,
(3) is run from an eastern bloc country (Croatia) known for high fraud,
(4) uses spam for "marketing" or "advertising",
(5) doesn't own the domain main for longer than the minimum amount of time needed,
(6) yet claims to offer long-term for-pay support packages
... maybe something to think about.
As for a free alternative? Nope, never seen anything quite like this before.