A good friend works at The Westin O'Hare - rooms have all been renovated (new casegoods, Heavenly Beds, new Heaveny Baths - and not just the shower curtain and showerhead). Guestroom product actual compares well with Westin River North and Westin Michigan Ave. I have heard rumors that lobby & restaurants may get a touch up as well, but haven't heard/seen anything yet.
I agree, I like Westin O'Hare over all of the other O'Hare hotels.