Just wanted to make a quick post the shows the size difference in the dock and the water tanks between the P10 Ultra and the Z60. As you can see, there is a pretty big difference. The water tank size is a little concerning for me, since the tanks in the P10 seemed to empty after 3 cleanings or so. I'm hoping the Z60 is a lot better on water consumption or something and that's why they decided to reduce the tank size... Time will tell I suppose. I'll update it here when I can speak more about the water usage. Hope this helps anyone curious about the size differences on these units!