I have a 6 year old garmin unit that I really like. I also have a Tomtom and definitely prefer the garmin. Better maps and speed limits show up on the roads that I drive on. I don't always see the speed limit signs and its a handy feature. If you can afford the lifetime updates that's what I wish I would have gone with.My sister and brother both have navigation units and its pretty handy, so I'm thinking about getting one. I think they both have Tomtoms, should I go for that or do you have any suggestions?