I hadn't tried these ones out, but my coworker did -- all three worked fine - all three have a brass tube lining.
For the styli on the left and right, I did not use a dedicated kit - I robbed the clip and finial from a couple of chrome slimlines, cut off a section of brass tube from some 10" lengths I had, and used the replacement tips from Berea. Berea now has several tip colors to choose from now - the one on the left has the new red tip.
I like the sierra one the best, followed by the one on the right. I'm not a big fan of the "fake camo" blanks, including the pink/red/black/white one on the left.
My coworker's wife is still deciding which one she wants to gift out. After reading some of the other posts on torn tips on the sierra style, I hope if they pick that one they don't have any issues. Time will tell, I'm sure.
Thanks for your comments.