Everyone giving this little gem less than five stars is an idiot!
I own more than five apps from this guy and they are all crafted with love and very easy to use. So is Pluto. BTW: that's one of the best manuals ever for a GTD program - it's a complete book. Pluto works perfect with iCal and my Dropbox and I can even run it from my thumb drive. I wish Apple would include this application by default.