Overall theme looks good after a some work but has a substantial number of bugs. The most annoying ones are:

1) Some responsive CSS media queries kick in at various points between 992px and 1000px width, which is definitely a bug. It causes the layout to go completely berserk between those two values because some styles have been applied while others haven't.

2) The theme colors settings aren't properly applied everywhere so we need to drop down to CSS editing just to get things looking right. Part of the reason premium themes are attractive is so that you don't have to go into CSS to make basic color changes. Also many of the color settings are not available from the customize screen so it ends up being easier to just use the customize CSS area to edit those colors to see the changes live instead of going back and forth from the theme options screen, saving and then refreshing the page to see how the changes look.

3) Lots of other small bugs that adds up to a decent amount of work to test at every width and fix accordingly.

I ended up doing a "find and replace" to change all 999px/1000px media query breakpoints in the theme back to the default 991px/992px Visual Composer/WPBakery/Bootstrap breakpoints. I don't know why the theme author decided to mess with the standard breakpoints, just causes a lot of issues. The problem now is that if I ever need to update the theme it's going to be a huge pain, will need to redo all the breakpoints again...