Map Compatibility Chart

After telling a customer that Garmin and tomtom have the best mapping data out of all the sat nav, we decided to look for his Mums house in ireland, tomtom found it... but when we looked at the map simply showed a massive field, "the garmin uses a different set of maps, they are probibly more accurate" so we tested the garmin... same results (one more road but not a massive amount of difference)

so in a last minute scramble i thought i'd check the navman, and by george it was listed... i dont care to know how or why, but it got me thinking, what are the limits of the sat nav ranges.

I'm going to start compiling 5-10 postcodes and addresses that i think wont be on the units, and then i'll test them, take some photo's and post the results up for you.

So ideas people, any postcodes that you've had trouble finding in the past post them up here