I finally got a chance to really use Navigon last night and I must say, a couple of times during the long drive, it made a couple of "questionable" choices. It took me off of a highway and on a side street and then back onto the highway for no apparent reason, and then tried to route me on another highway a bit later in the opposite direction of where I needed to go (I knew the area well and that would've taken me way out of the way). Does anyone here know what the difference between the optimum setting as opposed to the fastest? I would just naturally assume that getting to your destination the fastest would be "optimum".