This jack has been incredibly helpful during construction projects where I need to lift heavy beams into position. Because there's a lot of raising and lowering, a hand-powered jack takes a lot of time. I have an air compressor running anyway for other tools, so hooking this to the air compressor is no problem. It uses quite a lot of air volume, so watch out if other air tools are also using the compressor - they may run out of pressure ;) I recommend using hand jacking whenever you want to do careful adjustments, but generally one can count two or three cycles at a time quite easily with the air switch.