i have a Garmin etrex legend with removable chip. I got it 5 years ago, and have lifetime updates (not cheap, over $100). It STILL works. Its a handheld unit, that is mounted in my vehicle. I can swap out the card for the Topo if i want (free download). When i did have a problem last month updating, it was a 4Mb program i had to install. Garmin support is not as helpful as where i bought it.