Frost form cake tool

Has anyone tried the frost form cake tool? It is essentially supposed to create a seamless smooth cake using buttercream. It’s like a plastic covering around the cake that you pipe buttercream into, refrigerate, and then BAM.. smoothly frosted cake.

Has anyone tried this??

This is their Instagram:

https://instagram.com/frostform?igshid=uty4xgzg3zbg