I decided to purchase these cubes for two reasons:
1) They are made of recyclable Z-Board
2) The size is large enough to store vinyl albums
It's an added plus that they are easy to assemble.  Only disappointment is that the pegs used to align the sides are made of cardboard. Just not sure how well they'll hold up over time. I'll update this review in 6 months and let you know!
March 2016 - It has been over 6 months and the cubes have been holding up well.  They are really quite sturdy.

Pros: Easy to assemble and recyclable
Cons: Cardboard pegs