I completed the map update this weekend.
It does take about 30 minutes. The instructions cover many different models, so it says to keep your engine running the whole time. I think I lost 2 miles on the SOC sitting still.
The UI looks a little better, but my wife drives it more than I, so I don't know specifically what changed.
Step 1: Copy Files
Step 2: Prepare System Update
Updating the System
Step 3: Updating the MODEM
Step 4: Updating GPS
Step 5: Updating SUB MICOM
Step 6: Updating MAIN MICOM
EDIT: images are not showing up, but path looks OK. Just some images of the packaging.