Let's face it -- we love it when our mobile makes our lives easier, and according to a quick and dirty review over at Gadling, that's exactly what the Public Transportation piece of the updated Google Maps app does. Upon straying out into San Francisco with only clothing, an iPhone 3G, a few coins and a destination address, reviewer Grant Martin was able to figure out exactly what steps / stops needed to be taken, how long the journey would take and how costly it would be. All without visiting a website or hunting down a route schedule. Overall, he was pretty jazzed about the possibilities, though he does caution that the actual mass transit systems you use could inevitably let you down. Any of you given this a go? Love / detest it?