This program is so sweet heh. I love the almost snooty/naggy reminders it gives. I'm sure the novelty will wear off in time but if anyone is looking for a planner or reminder/task app, astrid is worth a try for sure. And it's free to boot.
Ah yes, now I remember. It uses Google Docs to sync w/multiple phones. We used that briefly but went with Our Groceries instead as it was a more seamless sync setup. We didn't need the to do list or any of that so for use Our Groceries just worked better.
I used to use Reqall on my iPhone and was looking for a replacement. Astrid seems to fit the bill, as it syncs with an online site for free, just like Reqall did. The syncing is key, because I want to view/edit my task list on my desktop. I wish there was an Android app for Reqall, though...
For us (read: my wife) the deal breaker was the fact that you have to remember to upload/download the list each time you opened it, made a change or closed it. Our Groceries is seamless and works great for us but Astrid would be the choice if we needed PC online access or the other functions aside from just the grocery list.
I find it to be a great reminder app, as I was coming from Palm OS's tasks which worked almost identical. I just wish the widget for this app would refresh itself when hidden tasks are supposed to be revealed.