The ability to pull together all of our various databases into one system was very helpful in maintaining consistency across multiple accounts which are spread out over three different countries! It's not perfect by any means but it has been great so far with no major issues that we've experienced since implementation last year (we're looking at you Google).
I would definitely recommend this product as there is nothing better when working within your own organization!! We have realized significant improvements from an efficiency standpoint through consolidation/integration of client information between systems such as HubSpot CRM vs Salesforce Marketing Cloud; also allowing us access via API or Webhooks where needed without having users login directly onto their account page each time they want some sort info updated etc..