I tested out the Hydraulic Power Twister, and it's a beast. This machine is good for working your chest, shoulders, abs, and arms. The hydraulic dial allows you to adjust the resistance from 22 pounds to 440 pounds. Using hydraulics instead of old-school metal springs is better because you don't have to worry about the bar snapping back and hurting you. It's a smooth, controlled squeeze every single time. And let me tell you, trying to close this thing on the maximum setting is so hard. The weight rating on this dial is definitely accurate. It has a thick carbon steel frame that doesn't bend or shake, and the handles have a nice, non-slip grip so your hands don't slide off when you start sweating, but it's best to wear workout gloves. It isolates the chest and biceps better than I expected for something so small. I am used to seeing all the heavyweights all over the weight rooms. As much as I like this machine, there are a couple of cons. The device can feel a bit awkward to hold at first. Watch your form and keep your wrists straight, or you'll definitely feel some joint strain. Another annoying thing is the dial. Cranking the weight up is easy, but turning it back down is hard due to the internal fluid pressure. If it gets stuck, squeeze the handles together while turning the dial down. That relieves the pressure and makes it way easier to turn. Overall, if you want an upper-body workout that is easy to store, this is it. Follow the instructions for the most effective workout