Mr Mac is a sucker for the gadgets and he got a sat nav the first time Aldi had them. It has been useful on a few occasions and has directed us to roads in housing estates that we would would not have found too easily.
My son used it in England and also found it great to get him from Heathrow to the hotel he was staying in.
It has most main roads on it but some side roads are not and the new M4 Enfield/Kinnegad bypass is not there but it picks up the old road again.
Some of my friends have them and everyone seems to be pleased with their performance.