Clay-HubSpot integration was a game changer for prospecting, but we hit some nasty surprises. Auth tokens died twice in the first month without any warning - sync just stopped and we didn’t notice right away. Now I check connection status every day. Here’s what no one tells you: Clay’s stale data will mess up your HubSpot reports. Our campaign metrics were totally off until we cranked up the refresh intervals. After three months though? 23% bump in conversions because reps weren’t chasing garbage leads anymore. Best part was auto-building lists in HubSpot using Clay’s company filters. Pro tip: set up error notifications properly. When this thing breaks, it breaks quietly and you’ll lose prospects.