OK, received the email and downloaded the test drive. Immediately, I like the layout. A long press on the Marriott logo in the bottom right hand corner takes you to a short menu.Following screenshots appear depending on menu choice.
Improved date selection, now only one calendar allowing choice of start and end dates.
The list of rates scolls down showing all available, advanced, member rate etc.
The only error I can currently find is clicking on the link to go to my SPG account takes me to the site showing Spanish text.