I'm a huge fan of front squats actually, but I generally don't do more than two pressing movements for my quads in one workout. So I'll pick two of three from Squats, Front Squats, Hacks, and Leg Presses and do them with my quads, some do more, some do less, that's just what works for me. The idea with front squats are that the weight is more directly over your quads so your hams and glutes come into play less. My advice is do them early in the routine, especially when getting used to them, because until you get your form down, it can be a real bitch to learn how to grip the bar. You might want to start out doing them lighter with higher reps until you get comfortable with the technique and then raise the weight. Like I said, I'd use it to supplement your current quad workout instead of using it as an addition because then you'd be doing a lot more quad than hamstring work. You should also be doing lunges lol, everyone loves lunges for overall leg development
Good luck, keep us posted on what you think of them.