All the manual creation of checkboxes, deletion, and moving of tasks to me makes Gist far from "The Best" to-do list. Personally, I find the lighweight Google Tasks just fine, especially since there are many excellent mobile apps that sync with it and builtin support for multiple lists. I wish the URL for it was a bit more memorable though (https://mail.google.com/tasks/canvas?pli=1). The only thing missing is date completed, which I personally don't find very useful, but a calendar would probably be better if you want to keep track of that.

Edit: Nevermind, it does save date completed.