I use a garmin gps with a friction mount, if i cant find it i type it in, faster than looking at a map and wondering where i am. The gps shows what street im on and what streets are ahead, send me out cold on any route and i can do it just fine. It is faster than looking at a map and plotting out my next stops, i just type it in and follow the directions. Also in before every old timer claims maps are superior and back in the old days lingo, i get the job done safely and efficiently, thats all that matters. Also i dont type it in for every single address, if im on the same street and i know the grid i just go from there, but moving from 1 section to the other can be tricky on routes you dont know so thats when i use it.