you should buy a gp system base on 1 primary criterion , accuracy of direction . the Pioneer system be fast and provide logical direction without constantly provide needless information . beware of off brand , they can give you illegal direction . I test a cheap mio handheld and be be direct to make left turn when you be require to make a right and use a jug handle . this mistake cause potential traffic accident and longer than necessary trip when be reroute . the PIO feature be nice , but I do not use it as often as expect . the bluetooth speaker option be awesome , and worth at least $ 100 for the safety factor .