The collaborators functionality on deals is great. We also have a number of scenarios where we currently use custom HubSpot user fields on other objects that would be much more effective if we could assign collaborators instead.
Eg:
Target accounts (companies) – we have a primary owner who is the Account Exec, then 1-2 other people assigned as “prospecting support” who are either vertical experts or researchers who help with early prospecting activity.
Custom objects – we have a custom object (First Meeting) that goes through a pipeline and then converts to a deal. Currently, this has the same “prospecting support” fields, but would be much better if we could assign collaborators and then carry them through to the deal object when created.