More Westin than W
I stayed here in March 2012 in a King Wonderful room with a City view. Generally speaking this is a nice hotel and I had a good stay. There's nothing wrong with the hotel, but I felt it missed the mark slightly. I love W's and have stayed in many from Seattle to Atlanta, New York to Hong Kong and there's always a fun vibe and great design. Unfortunately, the W Lakeshore did not live up to it's siblings. It was like a recently renovated Westin, and there's nothing wrong with that, it's just not a W. 
Pros - The Heavenly Bed was typically excellent and the room was well kept and very clean. The gym was small, but nice and with good Technogym equipment. 
Cons - As mentioned, it just didn't feel like a W. On arrival in the motor lobby there was a large wall with dangling shinny things, clearly meant to sparkle, but they were a little dirty and plenty were missing, leaving a poor first impression. The lobby was ok but nothing special and the room was average, from a W, I expect more wow and something a little design led. No upgrade from the standard room as a Gold SPG member.
My phone died and I made a sub 1 minute phone call home, I was fully expecting a hefty charge, but was thinking in the $5-7 range... it came in a couple of cents under $15... for under a minute! I know, I should have checked etc etc. but come on, $15 for under a minute, that's price gouging vs. hefty; I asked the front desk on checkout if they could lower the charge, but no joy. a $5 empowerment for the desk agent would have made me a much happier camper. 
Another bugbear, give me a coffee machine in my room! I don't want to go down to the 'Living Room' to get coffee in the morning, I'm either in a rush and don't have time, or I want to chill and have a cup of coffee in bed and read the paper. It was a simple ask and one was brought promptly, but I hate having to ask. Preferably give me an espresso machine in the room, but if not that, please put in a basic coffee maker.
All in all a satisfactory trip but one where I was not 'Wowed' by the W Lakeshore, hence the Average rating.