For the most part, assembly was straight forward and smooth. But we encountered 2 issues:
1.  Misalignment of one side of the stabilizing shelf screw holes resulting in inability to secure one side of that shelf. 
2. The screw that needs to be loosened to attach the side shelf is completely stripped and so tight that it cannot be loosened. Thus one side shelf cannot be installed. The side shelf was super simple to install. 

Only just got the grill. Hoping for fast and appropriate service from Blackstone!