If you like to use your navigation, but you're not in the market for a fancy new motorcycle GPS device, you can opt for this solution. With a solid holder you can mount your trusted old - but still working fine - device (GPS or smartphone) on your motorcycle and give it another couple of years of use.
Why? Well, because using adhesive tape is terribly impractical, you wanted to put your smartphone or GPS in a waterproof and shockproof storage space anyway, installing these on your handlebars is amazingly simple, and because they aren't expensive. Need any more reasons?