I am very happy with my recent purchase of the Alistair fireplace mantle.
Love the color. I ordered the Walnut. I wanted some contrast as my floors are going to be grey. It warmed up the space nicely.  I had to purchase a 2x4 to attach to the wall. No problem doing that, just thought it could have come with it.  
Installing was pretty easy once I got the 2x4 cut and attached to the wall.  
The hardware provided was enough. 
Very pretty in my new space.