Yaktrax are too flimsy and wear out too fast, Kahtoola's spikes are unusable around town or for driving.  Diamond Grips are the best all around.  I don't have to take them off to drive or for walking on pavement, and they do the trick in the backcountry 99% of the time.  Occasionally, on steep icy sections i wish i had my Kahtoolas, but that's not very often.