QRS Key Cover Closer?

[Joseph Garrett]

I have, in my little hot hand, a flyer regarding the QRS Key Cover Closer.
Has anyone knowledge of how this thing works and if it's any good, etc.? I'm
not about to lay down $48.00 on something that is doo-doo, if you get my
drift. And, that's an "Introductory Offer"! One zinger statement on the
flyer is: "easily hidden under piano". Huh?
Regards,
Joe Garrett, RPT, (Oregon)