We have had the earthquake bar in Massenomics gym for about 7 years. For as light as this is, and for as much as it gets used (quite a bit) it has held up surprisingly well. It certainly shows some cosmetic wear, but still holding in strong. I'm not really sure about the "science" behind unstable bars like this, but I can say I have always anecdotally really likes having it as a change of pace for my training. It's also just kind of fun.
Performance
Value
Build Quality