I have used these for my classroom. If the students aren't figety, and have a tendency to try to rock on everything, I am sure they would hold up better. I purchased four of these because they stack so nicely. I have only had one of the legs break.

 

Pros:  Looks great and they are stackable...
Cons:  If the leg gets loose without you noticing, it will break easily. Just periodically tighened the legs with an allen wrench to avoid this.