Now I remember, we stayed in Mizner.
I wouldn't know which building to recommend since I don't know what your family is looking for. So let me describe the few things I noticed.
Mizner is about 2 or 3 miles from the other buildings. It is on a busy street but located great for walking to restaurants and shops. As a matter of fact, the back of the building backs up to an upscale shopping center. Mizner also has an attached parking garage which you enter through a secured gate. We were on the fourth floor and only had to walk a few steps to the fourth floor entrance. No elevators or stairs to take. If anyone is physically disabled this would be a huge plus. We aren't but it was nice for hauling groceries and our beach bags.
Westin and Bonaventure are located next to each other. One of them is the main check-in. Whichever one that is, they have the really nice pool with a waterfall. That is also where the welcome breakfast buffet takes place. I enjoyed the pool at Mizner even though it wasn't as decked out in the landscaping. It was big and heated and had a great jacuzzi.
Westin and Bonaventure had parking lots that did not seem very convenient to the buildings unless you were in a handfull of lucky few.
As far as interiors go, I believe they all had an A & B configuration with A being the larger, more desirable. HTH.