We were pleasently surprised by the strength of these units. For the price tag they were asking (we got on sale for a couple dollars less) these are quite sturdy units. We have purchased several for use in different areas of our home; garage, den, dining room and a couple of bedrooms. They are great when you need storage space. The home we live in wasn't designed with storage in mind, so we have to make our own. While we're still thinking about the multitudes of options that we have available to us, these are getting us by until we make the decision on what we should do.
Overall, they provide 5 shelves each, they're plenty deep, very sturdy and accomodate an awful lot of stuff! Highly recommended!!