I always change my brakes myself... save tons of money doing it that way. But I can understand when people are afraid to do it themselves.. since it is such an important part of the car.
It\'s almost scary how easy it is to change out brake pads. All I need is 2 hours and my trusty C-clamp
![tongue5 :p](https://psx5central.com/community/Smileys/PSX4Central/tongue5.gif)
as for your question on how often to change them depends on how you drive. Some people drive with both feet (homos) and need them changed more often. As soon as they start squeaking you better change them fast.. cause when the grinding starts you\'ll need new rotors too (don\'t get them turned... I always get new ones when the grooves get noticable). Brakes should last you at least 1-2 years.