I bought this creeper several months ago after finally becoming sick of grinding to a halt on tiny bits of dirt under my car.  I used it for the first time in anger this afternoon during an oil change and am very pleased with how it performed.  It moved smoothly, even going from concrete onto carpet without slowing down (something my old creeper could never have done).  My only comments are that it could do with a better neck cushion and the 'pods' for the wheels tend to hit on things when underneath the car, but I'm sure that'll change after I get used to using it more frequently.  It isn't cheap, but it seems to be a quality product and it's also made entirely in the USA.