My PG upgraded Premier room was the best, because it had comfortable places to sit and read (or look out the winbdow) and a very good desk. I also like the windows in the bathroom and the double sinks, although the Andaz had a bigger bathtub.

For a regular room, I'd pick the Westin as the PG and Andaz are too IKEA in style for my taste. I think the standard Westin room has a small sitting area, but I might have generally had some upgraded room category to get this.