whether you want it to do anything else. I've got a T3 which i link to tom tom navigator 5. Because i already had the pda, it made it a cheaper option. also, with this one little gizmo, i have my diary, addresses, write reports on the move and of course have GPS. I think the maps etc are very similar to the one and they work well. Only a couple of times have i been sent off course and i think that this might have been an error on my part.