I love this closet system! My closet is so functional!! You can’t beat this for the price. My husband and I took about 7 hours to install this. My closet has baseboards, so we ran a 1x4 piece of wood along wall to attach shelves and tower to it. We had to cut down the shelves and the rods to fit my closet. 
It is particle board, but it seems super sturdy; I’m hoping it’ll last 6-10 years... My closet looks awesome!!