Bought it for a campaign, hit some snags. Address coverage is decent though not perfect. Will open a ticket for the worst chunks — hopefully a refresh fixes it.
Sorry to hear it didn't meet expectations, we'd like to dig into the specific rows that failed and refund or re-export them for you. Open a ticket via Help → Contact Support with the specific rows that bounced and we'll get a credit or fresh export to you within 24 hours.