Is it worth the rental cost of a car gps on a 12 day trip in Ireland? The trip is a sight seeing, B & B, tourist vacation. We can read maps fairly well. I guess I'm asking is if it will make the trip all that much easier.
I experienced getting lost on our way to somewhere in West Ireland, finally ended up in a courtyard after 5 km of driving on the wrong road. Despite the fact we had a map, but the signs weren't so good in that area, so we took the wrong turn. Because some of that area is sparsely inhabited we didn't find anyone to ask. But we were on vacation and I see it as an adventure to get lost, so didn't mind at all, and in the end we had lunch in a pub which we would never had visited otherwise.
The distances aren't that huge so my answer is that you probably don't need a GPS if you are OK taking the wrong road now and then. If it will annoy you then get the GPS. The newest phones have GPS (I-phones, HTC etc), you may want to check out that option.