When deciding which suitcase to purchase, I noticed some of the other suitcase reviews said certain models are actually larger than the stated measurements. I was hoping that wouldn't be the case when I ordered the Omni as I needed a new carry-on now that most airlines enforce the 22 x 14 x 9 restriction.  This suitcase meets the requirements.  Each measurement - height, width and depth - is slightly under the restricted measurements (see photos), yet it is amazingly roomy inside.  There are not any instructions for setting the combination lock, so I am also including a photo of where the reset button is located on this model.  To set a new combination on the Omni 20, the reset button is a small round button located on the top right of the combination box.  Hold this button in with a ballpoint pen, and turn the dials clockwise to your desired combination.  You will hear loud clicks when resetting the combination (normally no sound when opening the combination.)  When the combination is what you want, release the button.  The larger button on the right side of the combination box is to open the lock.  I am very pleased with this suitcase.