Update  Broke within 45 days and Wayfair wouldn’t replace the part (or the sofa).  No one in our house weighs over 170 and the arm snapped in half when someone sat on it.  Very low quality.  And it makes the perfect cat scratcher.  I would give it zero stars if I could.  

Original review  Very easy to put together. I just did it by myself in less than 10 minutes. 
It’s way too firm for my taste, but I’m counting on it softening up over time like many of the reviews talk about.
I was a little bit disappointed by the fabric. I expected more of a soft linen look￼ and this is more rough and more like heather gray.  But for 600 I’m happy overall so far.