I agree with both of them here.

I too do squats, front squats, and leg extentions.

Since I ride, I do not hit the calves to much, as they don't really need to much work. They are not that big, but I concentrate on my upper legs.

I actually eased off the squats a little and went more toward front squats and leg extentions to slaughter the quads.

The way I guage if it is working or not is this....

When I walk out of the gym, does it feel like I have a piece of string tied to each big toe, making me walk funny. If so, it was a good night at the gym.