I've been using Nextel for years. Free incoming and Unlimited two way is great.

Pros:

Wallkie Talkie (If you have employees or coworkers with nextel, say adios to paying for those calls.

Has a flip phone option

Credit Card capability

Modem capability

The new models (730i) is GPS enabled for a fee of course. Bye Bye Mapquest!

Nationwide walkie talkie

Cons:

I think they are expensive (my opinion)

You can never hide from somebody who has your two way number.
They will track you down like a dog.

Coverage area in my area is sometimes a pain but I would give it a B or B-

They will not give you a discount on a new phone if you want to upgrade.

Almost everyone in the country has to give Nextel a deposit. They have a stricter credit check than Rolls Royce