3 stars: Glad to find a replacement for todo.tx but I can't get the sort to work. The instructions are no longer on the sort page. I finally figured it out by looking at the screen shots in the play store.
5 stars: Great app. Having the ToDo list in a simple text file allows tweaking the list separately from the program. This allows me to use a text editor to view and edit the list. And because of the Dropbox integration to a PC, I wrote a simple script to push the priorities down one letter. So my A's become B's, B's are C's, etc. I can run this script whenever I find myself with too many "A" and "B" priorities. After running the script (once or many times) the new file will quickly get synced with my phone. I can't see how I could do that with other ToDo apps.
3 stars: Right now I'm hating it: something is wrong with the installation process It is not creating its folder in Dropbox/Apps. EDIT: It's working now; I reinstalled Dropbox on my (Linux) PC (tho I'm not sure how this would affect the install process on the mobile app), and I can create & edit tasks. SOME ADDITIONAL COMMENTS: I really need to be able to continue using the todo.txt command-line scripts to work with the file when on the PC; this can be accomplished by editing the todo.cfg file accompanying those scripts. However, the spaces in the Simpletask directory name on Dropbox cause problems when doing this, and I needed to create a symbolic link without spaces in the name in the Dropbox Apps dir...