When comparing Taskwarrior vs Go For It!, the Slant community recommends Taskwarrior for most people. In the question“What are the best productivity tools for Linux?” Taskwarrior is ranked 3rd while Go For It! is ranked 6th. The most important reason people chose Taskwarrior is:
The command line interface puts powerful filtering expressions, context, annotations, tags, due dates, reoccurrence, and user-defined-attributes totally in your hands. It’s fast and low friction.
Specs
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Pros

Pro Command line interface
The command line interface puts powerful filtering expressions, context, annotations, tags, due dates, reoccurrence, and user-defined-attributes totally in your hands. It’s fast and low friction.
Pro Extensible
Taskwarrior has many front-ends, services, extensions, hook scripts, and capsules available. Taskwarrior keeps a list of contributed tools on their site.
Pro Lightweight and fast
Taskwarrior is written in the speedy C++ language.
Pro Tasks stored in plain text files locally
Future-proof and easily integrated with version control system. You never lose access to your data.

Pro Sync across devices
When used in conjunction with the Taskserver, it can sync tasks (conflict-free) across your Taskwarrior devices. This includes integration with Mirakel.

Pro Supported internationally
It has UTF8 support and is translated into many languages.
Pro Customizability
Taskworrior allows you to define custom attributes and reports to your needs.
Pro Self-hosted Taskserver
You can be in full control of your data.
Pro Built-in productivity timer
Depending on your workflow, this can help you stay focused. Moreover it reminds you of regular, short breaks in between.
Pro Uses the Todo.txt format
Todo list are stored as plain txt files in a directory that can be specified by the user.
This allows to synchronisation via services like Dropbox and use it with Todo.txt frontends for other platforms (including mobile).
Pro Simple user interface
The user interface is very simple and minimalist.
Pro Free and open-source software
The source code of this application is freely available and everyone can contribute to it.
Cons
Con Command line interface
A command line interface is a arguably overly verbose, consequently tedious, way to interact with a To Do list.
Con Notifications don't look too nice on Windows
Due to limitations of Vala + Gtk on Windows I have not found an easy, elegant solution to display "native looking notifications".
