I bought one set of these and then after assembly and storing my shoes, I ended up purchasing a second set.  I normally don't ever give 5 stars, except for extraordinary cases, but I'm quite happy with the purchase.   After extensive comparison with similar storage types, this items seems like a very good value for the cost.
I would highly recommend to make sure your shoes will fit.    I wear a 10.5 and there is barely extra wiggle room.   I would not try to fit anything more than a size 11, in my opinion, but according to the specs you can fit up to a 12".   Plus, it will not fit taller shoes, keep that in mind.   The assembly was fine but you got to pay attention the orientation of the little stacking studs.   
Overall, again, I am very pleased with this purchase and feel it's a good value for the cost.