The answer would be, yes. I trusted it when Citibank offered it, and I trust it directly from the source, as well. Considering the large number of financial firms that license Yodlee's services, I think Yodlee's credibility has been well-established.

I've been using Yodlee's services for over 3 years directly from Yodlee, and for even longer through Citi... and I've had not even one security breach in any of my accounts (and I've got something like 60 accounts of various types registered).

If you used this feature at Citi, Yodlee had all the information anyway... if you trusted it then, no reason NOT to trust it now. Yodlee employs a number of security measures to keep your information safe, and as I said, I've had not even one security breach in all these years.

A number of other FTers have posted their support for Yodlee in this thread.