The racks were perfect for all my spices, including the commercial McCormick's spices you buy at the grocery store.  The shelves are also deep to hold larger diameter canisters.

I purchased two racks and screwed them into my wall side by side.  This helped to free up an entire shelf in my kitchen cabinet. 

I did notice that the racks had holes on the sides to enable you to drill the screws through it but if you line up more than one rack side by side, the holes are not exactly matched up in the same place.  This is not a big deal, just a minor design flaw.

One final mention, when I put the spices on the rack, I cannot read the spice on the bottle from just a glance because the front of the rack covers up the label on the bottle.  I guess it depends on what type of spice bottles you have and where the labels are located on the bottles.

Overall, I am happy with the racks.  It was very easy to install on my walls.