I have Mapsend Europe and continue to be astonished by how accurate it is. For example, I live in a tiny village in rural Cambridgeshire, UK and the top of our lane, where it meets the main road bifurcates leaving a small patch of grass no bigger than 5 metres wide. Mapsend shows this bifurcation and my Meridian shows it to be spot on.
Sure there are places I've been where map features seem to be a bit out (sometimes up to 50 metres) but overall I think the accuracy is pretty good for navigating by road.
The latest firmware from Magellan makes switching between maps stored on card really easy. My only wish is that Magellan would get their finger out and issue an update (as promised) for Mapsend Europe that allows regions bigger than 16MB to be produced.
I wish Magellan