Ok Woodchester, here goes. Well, basically, unlike so much stuff that's flogged to us poor tackle sluts, it works exactly the way it's supposed to, pretty much every time. I stopped using the old solid pva bags because I couldn't get then tightly packed and sealed, so they would sometimes unglue, and come off during the cast. This has never happened with the Rapide system. It's just so simple. First you attach a bag to the scoop, then you add your rig and fiil the bag. Once you've done that, you give the whole thing a good twist, to make it solid. Then you lick or dampen the outside edge of the bag, where it is held by the scoop. Once you've done that you just fold it back on itself, by sliding the scoop down over the filled bag, then press the dampened edge against the bag. Solid every time.