I have one and love it. We were paying 80.00 per month for 2 phones we used about 10 - 30 minutes per month with Verizon. I purchased my trac phone, a double minute card, and their one year card. We have not had to buy anything since and the coverage in my area has been pretty good.
I have heard that their customer support is terrible, but luckily I have not had to use it yet. The other thing is if you lose your phone, they will not refund you the unused minutes.
If you do go with Trac phone, it is usually better to purchase the time online at their site. There are usually extra minutes you do not get at the store. Also, try to find a phone with the double minute card included.