IIRC the Sheraton is at the edge of the common business/tourist areas and traffic is abysmal during rush hours. Might not matter unless you go in/out of the hotel a lot throughout the day, especially evenings. Check on google map so you know what you're getting into.

As for JW, location is great if you plan to spend lots of time in that area and generally walk or take one of the subway or above ground rail lines. Else, it's perpetually congested and hotel itself does not deliver. Was there in August. Got upgraded to a the deluxe room with a view facing the malls. Room was good for me. Rest of the hotel was a disappointment. Doorman, concierge, front desk, restaurant (food and service), club lounge (food), gym and that club/bar thingy in the basement next to the restaurant had consistently poor service and food (where available). There were a couple of people at the front desk and club lounge that were courteous and friendly (you'll remember them quickly as they stand out from their colleagues) but the rest spent their time chatting among themselves or checking their phones. When engaged, they ranged from robotic to borderline curt. Front door was propped open almost the entire time during my week's stay and smokers (guests and staff) circled the bin just a few feet away from the entrance throughout the day so you get to share in their indulgence.