I’m very pleased with this pull-out spice rack!  It’s very sturdy and slides very smoothly!  
One tip that was not mentioned in the installation instructions:  (see detail photo) when removing the unit from the base for installation, One of the black plastic release levers must be pulled upwards and the one in the opposite side must be pushed down to release the slides.  Once we figured this out everything was straightforward.  I’m afraid that the plastic part could be broken if forced in the wrong direction.