I have been in two of these. Ours were located in the "elbows" were the wings bend. If I remember correctly they were room numbers 7109 & 7309. It's been a while ago. We were in these rooms right after the wings were renovated. The room as I recall was HUGE... almost twice the size of a "regular" room. It had a king bed, a sofa bed, wet bar with a refrigerator and a table that was slightly larger than the regular tables that are in the other rooms. This room had two features that I found particularly memorable.. the fist one was a large bathroom, that was actually a "walk through" bathroom with two doors.. one at each end of the bathroom giving access from either side of the room. It also had the separate toilet area, that also contained a regular shower separate from the bathtub. The other feature that we really enjoyed was the view. Due to the location of this room... it had two sets of sliding glass doors. These two sets of doors really opened the room up and provided incredible views of the interior portions of the resort.
I have stayed in tower rooms five or six times and wing rooms five or six times. In my opinion... the Junior Suite doesn't provide a "Magic Kingdom" view... but it's size overcomes that. If I had my choice between the two.. I would probably choose the Suite.
Tom