I used mine very sparingly for the "free" period (which doesn't include what you think it does). Don't give them your credit card number so they can keep it "on file" as they say, because they will automatically bill you when your free period is up, and it is an outrageous price. I got an email stating they were automatically billing me and I called them immediately and cancelled. They tried to sell me a cheaper package at that point, which was still too much, over $45 a month.
I thought I had turn by turn directions and the first time I went to use it they said that it was only a trial period (not 12 months like they had hinted) and that it would cost me to sign up for that. The phone was free for 3 months, but then I had to pay for minutes, and I found out that if you don't use them within a certain time period, they don't roll over. I never needed the emergency call button so that never came into play, so I don't know how long that was actually for.
Call them up and find out exactly what you get "free."
Joey