"There's definitely a performance-enhancing effect if you use things that improve oxygen transport to the tissue, " says Larry Bowers, an expert on athletic drug testing and senior managing director of the U.S. Anti-Doping Agency.

FORBES: Magazine Article

And since it's basically just a 64-MB memory stick, you can still use it to store and transport important files.

FORBES

As I've mentioned before, the "Selective Auto Completion" option - which means you don't have to touch out - that Transport for London (TfL) can use when there are large crowds also has flaws.

BBC: Next generation Oyster cards could stop overcharging