Sanyo MM-5600

Does anyone have more info on the calendar features of this phone? I'm tired of carrying a planner... and I'm ready to upgrade from my old "Freebie" 2G phone and spend some cash on a new phone. I had plans to buy the Samsung I550, but it is no longer an option.
So if the 5600 has an easy to use calendar, I'll buy it. Or is the only other option with close features the Treo 650?
Thanks in advance!