Ranked in these QuestionsQuestion Ranking
Pro Open source
Ardour is open source, so it can be downloaded and modified without restriction.
Pro Compatible with Linux, Windows 7/8.1/10 and macOS
Ardour is cross-platform and works on Windows & macOS.
Pro Clean linear interface
Pro Linux version has JACK support
On Linux, you can use JACK to freely route audio and MIDI to and from other software as hardware.
Pro Free version with minimal limitations
Unlike some other DAW's which often limit saving, exporting, or advanced features, Ardour permits you to try all the features for free, with the only limitation being ten minutes of project length maximum.
Pro Inline mixing console
You can view and edit plugins directly from the console's mixing channels.
Pro Multi-display support
Pro Excellent support community.
Pro LV2 plugins support
Pro LADSPA plugins support
Pro Powerful routing
Thanks to JACK support, and the inclusion of built in tools, the routing options of Ardour are limitless.
Con Relies on JACK
The Linux version relies on JACK to function correctly, and JACK is extremely difficult to install and configure. Ardour should have JACK support, but it should also connect directly and play audio on its own by default.
Con No support for VST plugins for OS X
Plugins can be used on OS X only if they are downloaded in AU format, which is supported.
Con Not user friendly
Ardour can be difficult and unconventional to use.
Con Builds are paid
Pre-built releases are paid and the only way to get the program for free is to build it yourself.
Con No 'scenes'
Ardour doesn't have 'scenes' like Ableton does (would be very handy for live-preformances).
Con Too many plugins
It is hard to find good useful plugins. It looks like every developer's plugin has ended up in the list.