I purchased this bag in ottone a month ago. It's a beaut! The interior is mainly a light beige suede topped by a leather lining the same color as the exterior. And it does have only one long interior zipped pocket.
It is by far my favorite Bottega! I adore the Sloane shape (hobo style, but shallow enough not to droop). It is this color, however, that makes it special. The ottone color (a taupe/bronze shade) was only introduced once before, and came as a surprise to boutiques this season, featured only in the cabat and Sloane styles. No one knows when or if it will return again.
I fell in love immediately, searched high and low to find it in Saks, NM, etc., but could only locate it in the BV boutique. You should LOVE this bag! Good luck!
(BTW, there is an excellent photo of this bag and color on the Reference Library thread.)