Is it really necessary for serious cyclists to spend upwards of $500 on a crank-based power meter when the majority of the data it provides can be easily replicated with a decent speedometer and a basic understanding of physics. What exactly does a crank-based power meter offer that a low-cost alternative doesnt, aside from an inflated sense of self-importance and the ability to claim ownership of an overpriced gadget? Are we really just paying for the privilege of having a fancy power number to throw around on social media, or is there actual, tangible value to be found in these devices?