Everyone who has clients that don't pay when they receive the 1st invoice. So, my guess would be everyone. Otherwise I spend hours pulling invoices from Sents and such.
This should be automated, not manual. Please see TimeSlips as an example.
It would be great if clients paid asap, they don't. TimeSolv can implement this change once - rather than admin having to do it over and over.
How often would you use this request?
Every billing cycle.