If you hook a good antenna up to it, it should do quite well as a basic starter set. Do you plan to use it as a base staion or use it mobile?
For a base antenna, I would look at the Solarcon A99, or something similar. They are a half wave, fiberglass radome antenna that is 18 feet tall, comes in 3 thread together sections, and is cheap, lightweight, simple, and easy to install. They work very well, I talked all over the world from Australia to Europe to Africa, Asia, and all over North and South America with that antenna and 25 watts.
For a mobile antenna, it kind of depends on what kind of vehicle and if you are willing to drill a hole or not. That said, my favorite mobile antenna is the Wilson 1000. I use the magnetic mount version, but there are other, more permanent mounting options as well. They are not the least expensive antenna, but they are rock solid performers, built in USA to last, easy to install, and they look pretty nice, too.
A good antenna is an absolute must if you want to get anything out of a CB. A good antenna will make a budget CB like the one you just bought perform like a "big" radio, as we like to call them in CB world. And a with a cheapie antenna you will most likely not hear or talk much past your driveway on some days. 8)