The guillotine press – where you bring the bar down to your neck instead of the lower pecs – is a great chest developer. But there is risk. Keep these light and under control. This is not a bench press variation to go heavy on. And don't try to set a PR! This is bodybuilding, not powerlifting.
My favorite way to use it is 6 x 6 with 20 second rest periods between sets.
The reason you're not doing one of these squats is because it's hard. The reason you're not doing the other is because you probably never thought about it. Check it out.
It helps the powerlifter squat big weights and the athlete perform better, but what can the box squat do for the bodybuilder? A lot more than you'd think.