I purchased this because I had an old plastic shoe rack from Target that would collapse every other week.  After its final collapse, I searched the internet for a steel/metal shoe rack.  I came across this one. Its very sturdy and it even has wheels.  The only bad thing was putting this rack together.  It took more time than expected.
I use this for regular shoe storage. 

Pros: sturdy; uses screws to keep unit secure; fits (in my opinion) 50 or more shoes;  has wheels
cons: assembly takes long than expected, but can be completed with patience