Not really , waste of money . If the amp doesn't feel heavy in your hands , its probably made crappy and closer to 50 watts if that . And their will be no filtering , so your gonna piss everyone around you off when you interfere with their TV's and phones . Those are the reasons they are illegal to use on CB .
Not to mention , that it doesn't matter if you have 4 watts or 400 watts when the band isn't open for long distances , remember MOTHER NATURE , determines when your able to talk far .
An amp maybe gets you around the metropolitan area you live in , most of the time
Spend your money on a good antenna and forget the amps .