The brackets are nicely done.  The wood is just a 2x10 cut and stained and mine came 5/16" and 7/16" short of 36" (not a deal breaker).  So you could get the shorter shelves and if your handy, make new longer shelves then stain or paint as desired or customize the length with one long shelf and a few brackets.
The screws are nice with matching finish to apprear concealed after install.  But, no drywall anchors included, so it's assumed that you'll find a stud and screw into it.  I did not use stud mounting as it didn't work for my layout.  After trying a few things I found that Cobra Tripple-Grip (green plastic pieces even though the card is yellow in the picture) 1.51"x0.375" anchors from Lowe's were big enough to accept the included screws.