It makes my life easier and the life of my sales team easier. I have full visibility on how each opportunity is tracking and the current trend for that particular month/quarter from an easy to use view. Additionally, the relationship plan feature actually accelerated some opportunities to close sooner. For me, the ability to see through some of the fluff and feel very confident about my weekly sales forecast was a priceless.
Three is a bit of a learning curve to get started but the customer success team was always available to jump on the phone and walk me through any questions I had.
It fills in the gaps that Salesforce cant quite do. The salesforce sync allows it to be up to date at all times. I find myself generally doing all pipeline and forecast reviews out of SD.ai instead of SF now.
Forecasting reliability, advanced reporting, opportunity management.