Garmin nuvi 200W Car GPS Receiver

We use our Garmin (we named her Sally) daily. We travel for work, so we depend on Sally to tell us where to go. We've used her in about 30 states so far. The only one we have had trouble in is West Virginia. We got up in the hills and she said, "awaiting better acuracy" (in other words, "Better luck next time!"). I would say she is about 95% accurate. We've been to a few businesses that where not actually there, but she usually gets us where we need to go.
We've used her daily for about a year and a half now and it still works just as well as it did when we first got it.
The map update which you are suppose to get after a year is a little pricey. We have put off buying it. It still works fine without it. I'm not convinced that we need an update.