It's pretty simple to put together (however the included instructions are zero help).  One of my support pieces had a flaw, which means one of the shelves isn't able to be used.  The pictures make it look like they fit together to make one long shelving system.. but really they are just lined up next to each other.  I used zip ties to hold them together.  I like that the shelves are adjustable depending on where you fit in the brackets.