I've been using the ATT digital one rate for about 15 months. I've had very few area's with coverage issues.
The no LD and no roaming is a wonderful deal.
I generally average about 850 minutes of use a month. And since I travel all over the US, it's a great deal.
The savings from pay phones and calling cards just about pays for the 1000 minute plan for me.
I highly recommend it for anyone that travels alot in the US.