Earlier this year I was alerted by the bike, advising that my rear tyre pressure was low. I stopped at a filling station and found the pressure a bit low, but I knew it had been OK earlier, so I assumed a slow puncture. Normally I would ride slower and keep stopping to check the pressure periodically. With the Nav 5, I stuck the rear pressure indicator on the Nav and rode at normal speeds without having to stop to check the pressure, it does have its benefits.