O
One Day
If the bbb helps promote back buttering, then it's a thumbs up from me.
Meaning = I know the bbb isn't generally well received.
Most seasoned pros are already using back buttering and either a dolly, washboy etc. But if a product gets out there and at least makes people see the need to back butter - whether they buy one or not - the promotion of best practise - it's a good thing for the industry.