Yes, i know how to set restrictions, but are they really work?

one more thing, i had cvs navigation on last job, igo navigation in device but route calculation better then primo-wince or nextgen that i put on my phone or tablet, same truck information in devices

my navigations usally goes trough town when i reaching to the loading/unloading, shorter way always, cvs goes around about 5-10km longer route but avoid towns, what im missing to get my nextgen on tablet work like that