I had to choose a “main reason” but this is definitely not the only one! The theme is full of useful features (accurate page description) and is easy to get a grip of. There is a lot of customization available, and has a great plugin compatibility.The team made a ton of video tutorials, and for the last 9 months of using the theme, I have found all the answers I have needed so far on the customer support forum. They are really active, and it seems that they look at all the requests and try their best to help. Looking through the forum, it seems the theme can have some issues sometimes, but so far, not only are they quick to fix it, but I have not had any issue myself.
