Never used it - for MI's best to contact the Scottish Family History Society or the Family History Societies for individual areas Borders FHS, West Lothian FHS, etc
MI's records are usual published by the FHS' and complied by volunteers
the FHS' usually have research facilities
each areas resource can vary - dependent on what info you require
Remember not all burials have a stone - can be best to check the local authority lair/burial records