Those are harder than regular squats IME and lunges are gay. Plus single leg leg press is a nice glute/ham move IMO. Trying to pick an exercise thats easy to learn and progress on... doesnt get much easier than leg press.
Anyone mess with vertical leg press? Wifey does not like squatting and I am feeling like she doesnt need to. When we were in NYC she just used the hack squat machine and had sick legs. We dont have space for a hack squat machine tho