Ranked in these QuestionsQuestion Ranking
Pro Open source
Ardour is open source, so it can be downloaded and modified without restriction.
Pro Clean linear interface
Pro Compatible with Linux, Windows 7/8.1/19 and OS X
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 is very difficult to install and use.
Con Missing compatibility
Ardour isn't compatible with Windows.