Join Date: May 2019
Location: Post Falls, ID (20 miles east of Spokane, WA)
You can stop it briefly during travel to check it's progress, but the owner's manual also says "If the retractable hardtop is not completely opened or closed, the system will cause the the retractable hardtop to slowly descend after 3 minutes." It also adds, "The retractable hardtop will descend immediately if the ignition is turned to OFF during the opening or closing of the retractable hardtop. Always completely open or close the retractable hardtop and do not shut off the ignition during the opening or closing to the retractable hardtop."
There's no explanation what might happen when you don't follow the instructions, but my assumption is it's not good to do. (I have and '07 and these warnings are on page 155 of the owner's manual.)
Still standing in North Idaho...