I gave a 4 due to one of the shelves that was damaged, but overall the product suits my purpose.  There is amble space to accommodate my intended purpose.  The space between each shelf is approx 10" and I used baskets to store items on the shelves. The backing was tricky to get to stay in place I would suggest that once you get them in place to use glue.  I did not use the doors as many suggest they do look flimsy.  The unit did not take long to put together and does not require help.  I also used the felt cushion on the bottom caps for ease of sliding or pushing.  The product looks good for the price with amble space.