I have used many content management systems over the years. Most fail to impress me because they tend to be overly complex and often times very slow.
A few years ago after trying out ExpressionEngine I discovered Craft CMS. Craft CMS is by far the most user friendly content management system in my opinion. I was able to get a website created in a few days vs months with other systems. Craft CMS has been the best platform for building websites I have ever used