Better then stock and stock extended stop. - TangoDown Vickers Tactical Glock Slide Stop

Those are the only ones I’ve used but this one is the best. All the benefits of the extended one but with the sleeker look of stock and without the annoying “always lock back when racked” feature. I have to write more so I’ll mention that the machining has more lines and a slightly different shape on it so your thumb can hold it up much easier then the stock ones. It also manages to tuck closer to the body of the gun. It has a small area that has more surface so you can pull down without breaking your grip.