I’ve had a lot of sanders, from the hateful Porter Cable bottle one, various 1/4 sheet ones, various RO ones, even vintage sleepy 1/3 & 1/2 sheet. They seem to work for many folks, but I gave up on random orbit sanders- got tired of replacing expensive hook & loop pads, & still having sanding sheets frisbee across the room, or adhesive pads that don’t come off without leaving a big mess. Anyway, these are great- quiet, low vibration, never jump around on the workpiece, very flat, good lock-on button. The clamps are substantial, pulling the paper tight as you lock them, none of that flimsy wire stuff. Sand into corners, use inexpensive paper, making it easy to keep a variety on hand. Makes sanding almost pleasant. I have two of them, with different grits, & have installed long cords. I don’t punch the paper, but if you hold at a diagonal, the dust gets picked up from the edge of the pad. Highly recommended.