Purchased my 28” Griddle from a big box store.   This is the easiest assembly I have encountered. The instructions were excellent.  The parts were precise and all of excellent quality. 
Everything including the cover is old the highest quality.  
I seasoned and cooked on my new BlackStone yesterday and am continually impressed. 

Hats off, singing praises, and SHOUTING from the rooftop. I LOVE my BlackStone.