Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Garmin Nuvi 250

I had been shopping around for a GPS Navigator for a couple of months. I decided to look at them on Amazon.com I was surprised to see that Amazon was cheaper than any other store. I decided to go with the free shipping to save money Knowing that it would take longer to get, I was surprised when my purchase was delivered in three days. This GPS unit, for the money is the best investment that I have made in a long time and the level of service that I have received from Amazon.com is second to none.