Front squats can be a stand alone great quad/leg exercise. And you can do them in the same workout with regular flatfooted squats if you wish. But front squats are an exercise that may take some getting use too. Might want to just start off with a bar & higher reps at first, getting adjusted to the movement. Most guy's, who may be good regular squater's, rush into this exercise not fully understanding the mechanics of it. And in a large part, fail and give up on the exercise. Approaching front squats with serious intent, it can develop all around upper and lower body strength.
Front squats require more flexibility/stretch in the shoulders, arm, elbow and wrist area. Also balance and control. But it can be a superior quad movement when done the right way. Olympic lifters are a prime example of quad/leg strength and development, the outcome of front squats and squat cleans. Though, on occasion, will do regular back squats. Actually if only one exercise could be preformed, for strength and development, I would choose the clean and jerk-press, but in a higher range of BB'ing reps. Also develops exceptional stamina. Good Luck.
