i have read widely that dymanic pricing has changed and will continue to change to the point where you are probably going to pay more all the time than taxi's for an equivalent fare....but hey, at least you can use an app for it and hop into some persons "newer" car. although unlike here in YYZ, i have not seen a poor and unclean taxi in my trips to japan...
in fact, i think that drivers have started to realize that their cars, like cabs, get pretty ratty when you put on lots of KM with people getting in and out of your back seat.
it is experiences like this that lead me to believe that uber's interest will peak and drop in markets where things like this happen...