Ranked in these QuestionsQuestion Ranking
Pro Has a great overall sound
has support for Windows, Mac OS X, and Linux, for 32 and 64 bit. Works with CoreAudio, ASIO, and ALSA, as well as integrated 3rd party/open source routing software support, I.E. jackd on Windows and Linux.
Pro Proprietary software that contributes to open source
provides features and bugfixes to upstream Ardour project, and also provides a portion of sales revenue to Ardour's development and administrative maintenance.
Pro Based off of Ardour
Modified version of the open source Ardour DAW, with Harrison's proprietary interface and software tweaks
Pro Great/intuitive interface
Many parts of the interface are designed as one function per control for ease and simplicity, and are modeled after physical consoles and mixer controls to further that end
Pro In-Line/Built in analog summing
tube and transistor emulation, based on physical consoles made by Harrison
Con Limited/buggy MIDI support
problem inherited from Ardour dev base