Based on my experience, these industrial air-filled casters are extremely reliable and smooth. They can carry heavy loads with ease and their swivel mechanism allows for easy maneuvering. The pneumatic tires also make it easy to roll smoothly over uneven surfaces. They have greatly improved the mobility of my material handling equipment. However, they do require regular maintenance to ensure proper inflation of the tires, which can be a bit of a hassle. Overall, these casters are a great investment for any industrial and scientific setting.