Is the Polar H10 worth roughly double the price of a budget strap like COOSPO?

High-trust testing and specialist communities repeatedly call the H10 the accuracy gold standard and the most validated chest strap, which is why it commands a premium. That said, several community members report that inexpensive dual-band straps deliver readings close enough for everyday training, so the premium mainly buys validated accuracy, build quality, and broad compatibility rather than a dramatic everyday difference.