Hydraulic cylinders in building hoists offer several advantages, including high force output, compact size, and precise control. They provide smooth and controlled lifting, which is crucial for heavy construction materials. Additionally, hydraulic systems can generate large amounts of force with relatively small cylinders, making them space-efficient. The disadvantages include potential leaks, which can be hazardous, and the need for regular maintenance to ensure the system's reliability. Hydraulic systems can also be more complex to install and repair compared to electric or manual systems. Furthermore, they require a constant power source, which might not always be readily available on construction sites.