Draw is one of the most difficult types of spin to put on the cue ball accurately. Some people still prefer to use it in many situations, but generally it is easier for players to make precise position using follow rather than draw. A big reason for this is because there is not a simple way to tell where the cue ball will go on an angled shot. With follow and stun you have the fairly reliable 30 degree and 90 degree rules to help predict where the cue ball will go. Unfortunately I have found the only way to predict exactly where the cue ball will go with draw is through feel. After you use the draw shot enough times you will have a good idea of where the cue ball will end up.
There are two variables that change the direction of the cue ball after is strikes the object ball with draw. The first is how much backspin is on the cue ball on impact and the other is how fast the cue ball is struck to hit the object ball. If the cue ball is hit harder then it will take longer for the backspin to catch on the felt which makes the cue ball swing out wide when hit at speed. If you hit the cue ball with less speed and more spin you should find that the cue ball comes back at a much tighter angle then with more speed. Part of learning how to draw the cue ball is figuring out how to balance out these variables in order to get to the position you want.