they are very easy to install, and adjust. the wheel just mounts to the front of the crank pulley, and the bracket relocates the crank position sensor (I think thats what its called). I was just like you when I bought mine, I had know idea how it worked, or where it went on the car. but the directions where very simple, and shouldn't take you more then an hour too install. as for adjusting, all you need to to is loosen the four screws on the wheel and rotate it left or right depending of you want to retard or adv. your timing. Shouldn't take you more then 2 min to adjust. there is markers on the the wheel, on mine each one =1 degree. the bbk should be the same. as for the "is it worth it" question, throttle response was greatly improved along a little extra pull throughout the powerband. but you also have to see it this way, I think they are worth $169, but now your going to be paying 20cents more per gallon, over time that adds up.