Things I liked: Just purchased a second set of these. The 6 total magazines we have now are about right for a CO2 cart. When we order out PPK/S with pink grips for our daughter we'll go ahead and order 2 packs of these with it.
Things I would have changed: Not a thing.
What others should know: Well, truth be told, our kids love reloading these for me!
Things I liked: Much easier to load than our Walther PPK/S magazines. The spring loaded handle indexes in place so you don't have hold the handle down and load like the PPK/S mags; plus the loading port itself is beveled allowing the ammo the virtually find it's way in. Metal housing - nice. We bought 4; should have purchased 6!
Things I would have changed: Nothing.
What others should know: The clips work great but I've found the CP99 is sensitive to how you load the CO2.