Yes the Meffert's versions are quite nice. I dunno if it's 100% HIT rate, but I have two of them, the first one being pretty good, the second one didn't need much time breaking in. But after 2 years my first one is really smooth.
The plastic are a bit thicker than the others out there. There's some knock offs out there as well. I haven't touched those so I can't really say they are worse or better.
I'd go with the Meffert's - and ask Uwe (or Jing) to see if they have the 6 colored version as well
(They had both the 12 and 6 colored ones in the past).