I’ve only been using Backpack for a day, but I can safely say that delivering reminders to my mobile phone is actually pretty effective. I don’t carry around my PDA everywhere anymore. And checking a web-based to-do list requires finding a terminal with Internet connectivity, which isn’t always possible. But since I do carry around my mobile phone everywhere, I actually receive reminders while I’m running around doing things instead of coming home to 5-6 reminders in Outlook/Evolution for tasks that I already completed.

37Signals did a good job of simplifying the information layout of Basecamp for personal use. But still, is this it? Ta-da List with chronological notes? And why would I pay for file/image storage when I could just store them someplace else (for free) and link to them in my notes?