Does this creeper roll smoothly on concrete garage floors?

Yes, the wheeled base is designed for smooth movement on standard concrete. Make sure your floor is reasonably level and clear of debris for best rolling action.

Can I use this as a seat while working at my workbench?

Absolutely. Flip it to seat mode and it locks in place for stationary work. Height and positioning let you stay comfortable during longer jobs without the rolling function.

What's the best way to clean and maintain this creeper?

Wipe down the hard panel with a damp cloth and mild detergent. Keep the wheels free of dirt and debris so they roll smoothly. Store it in a dry area to prevent rust on the metal components.