With 12 trips to Irelandexperience (last in May, 2016)...we found GPS to be wonderful...especially since we've done it previously with guide books & paper maps. If you have a companion - one of the cell phone apps is great. Driving in the town (Dublin) can be a pain...we've found it easier to bus & or taxi. Goggle maps are nice to plan ahead of time, giving you local sights, places to eat along the route, etc. Have fun!