I too have an SBS1 on order. I worked in ATC for many years as well as airline operations and management.
I have monitored ATC transmissions since the 1960's as a
professional interest and this bit of kit will add greatly to my enjoyment.
I am told that any would-be purchasers on passing over their
names and addresses are security checked before the equipment
is finally delivered. If that is in fact true I do not know.