Financial Institution connection success stories?

Does anyone have any favorite success stories about direct connections to their local Financial Institutions?  I'm always a fan of getting financial data from an ERP connector (quickbooks, intacct, whatever) but what do you do when there isn't a financial institution aggregator in place already?  I've read some of the behind-the-scenes stories about the companies who help provide these third party connections like Yodlee, but didn't see anything like it on the connector page.  Does anyone find regular success via custom API dev to connect to their local FI?