Things I liked:The Umarex speed-loader does make it easier to load magazines more quickly, BUT - it's not exactly precision made. It's just a $10 molded plastic item, after all. Things I would have changed:Make the plunger shaft from metal, or at least sturdier plastic. I'm concerned about breaking it, considering the amount of force required to push BB's through the device. What others should know:If you have an Umarex semi-auto BB repeater with a removable magazine (especially if you have more than one magazine) get this speed-loader. It's certainly worth ten dollars, just for the convenience.