Tomtom ease question

So I finally broke down and bought a GPS unit. I tried it out in the city of Calgary Alberta Canada, some POI's worked like a charm. But other POI's took me to the wrong place or slightly off the actual location. EXAMPLE: I punched in one of the many Walmart locations in the city, but it took me too an industrial park with no Walmart in sight????

Question; After purchasing the unit, do I have to download new software to update it or should it be up to date already? Why would some POI's be incorrect? Any input would be greatly appreciated.

thanx all:thumbsup:

Bump please :bump:

gpsunderground......enjoy......:D

Thanx bud!