These shelf,s have no separate metal mounting brackets , they have 4 blind elongated holes which are  pain to locate onto the screw heads because you cant see them to line them up, why they can,t supply a template it would make drilling the holes a lot easier.
The large shelf is quite heavy so you will need two people to offer it up to the wall.
The finish is average a few marks and blemishes, but having giving you the con,s the pro,s is now there on the wall they do look good, which at the end of the day is all that counts.