i just recieved my navicore software, i already had a gps unit so i just bought the software only. It works GREAT, i used it on the way to work and threw about 5 or 6 direction changes (shortcuts that i knew about) and the software adapted within 15 secs. it even knew for a newly built divider down the road. i know that there are faster units on the market but ive never had one before and it works like a dedicated unit. one thing you need a 2 gb sd card not a 1gb like the unit says. actual program size is any where between 1.4 - 1.9gb. but once installed everything works great. only thing my impatience missed out on is a vehicle mount but oh well i can get that later or make something work.