After using one for 3 hours the push rod that cradles the needle grouping bar slipped out!
Very good product, clean small lines and dot work
If you need a liner that will put in into the skin where you want it, these are awesome! I have used the regular Cheyenne cartridges and the needle slides around in the tube opening due to that membrane type recoil they use. It holds the needle in the center of the tube allowing it to move all around the opening. These Helios liners sit right in the bottom of the tube opening and stay there. They don't wobble around and you can get good clean consistent lines every time!
So far I really like these cartridges, I especially like the open tipped ones. And unlike other liners I've used I haven't had a problem yet (especially the 5s).
Over all a great product and a great company to work with