Dedicated does have advantages, and those may differ for different folks. Just research it well as the GPS marketplace is not enjoying the margins it did a few years ago, because a lot of folks don't buy them as much due to excellent GPS functions some smartphones offer nowadays. Main advantage for me is that I do not have to worry whether the phone does multitasking efficiently: no intrusion and conflicts. I drive for living and had experienced poor quality with some dedicated units of late, beware of suspiciously low priced units with lifetime map updates and traffic built in. Data combing is non-existent, time to market is shortened dramatically, they cut corners due to lower margins and sales volumes, etc. There are still excellent units out there, but you have to research well. May be somebody will chime in with positive smartphone experience. Things I like about dedicated units are (not limited to): speed limits display and speed & red-light-full-stop cameras databases. Some pay-for add-on software for smartphones can do these as well, I am not up to date..