We see people on them everyday, and you really should own one for various reasons. It can be used for alternate transportation and hualing supplies, it is a way to get in shape with no impact training. With a few modifications, it can be used to generate power for various devices, from generators to tools. You can aquire them easily enough, a lot of people throw them out from time to time, and they are easy to repair or make into any or all of the forgoing. They are also good for rehabilitation from injury.