I feel like this product solved my problems with belts:  my jeans have varying waistline heights (and thus different waist measurements) and conventional buckles look bulky with a knit shirt worn untucked.  This belt allows me to cinch up or loosen my belt as needed.  The belt 'lump' is gone, and I am not constantly hitching up my jeans!

I also feel that the buckle is very easy to use (clip and done!)