CNET's Jay Greene tried out several pricey GPS-enabled goggles with heads-up displays showing his speed, distance traveled, and more. The gadgets, alas, often proved as vexing as they were downright cool.
Here, Greene sports the $550 Zeal Optics Z3 goggles, which proved the most reliable of the batch that he tried.
At first, the I/O Recons worked pretty well, but after three days started to show some flaws.