Don't want to burst your bubbles, but believe me that it is a big stretch by SPG to call this property Westin "Ubud" ... actually the website's view of the list of Bali properties is downright misleading, saying (bolding mine):
"The Westin Ubud Resort & Spa - Opening July 1, 2012
Ubud
Ubud, Bali Indonesia
Phone: To be Announced Fax: To be Announced
0.29 km / 0.18 miles from center of [U]bud."

If you open the resort's few pages, even the website then mentions that it's 12 kms from the center of Ubud. With the ever increasing traffic in Bali including Ubud, this distance (most of which not on main roads, even for Ubud standards) can easily mean 30+ mins drive/shuttle ride to Ubud.