I use the old style in a 1000 tank. Once you get the hang on how to ratchet and work your thumbs and fingers, it goes in easy. I did have a newer jobo system once and wish I had never sold it.
They work fine once you get used to them.
Every now and then I use a metal tank just to keep in practice with that system.
All in all, I prefer the patterson system with the metal ball bearing though.