I only have 2 complaints about the Zen.
The first is the usual "Gold Plating sucks". I bought several gold ones, and the one I carried around for a few weeks wore off in parts quickly, but I think most of us know this is not a Zen problem. The only Zen issue is no Gold Ti option. Black Ti is better, and Chrome looks better, but I have not purchased that one yet...
The magnets all seemed to hold just fine for me, but I was not thrilled with the way it tended to "grab" the tip of the pen when capping, due to the magnet being in a ring near the opening of the cap. I would LOVE it if they would put the magnet in the body, near where the cap comes to a close, but this would require 2 magnets, one for capping and one for posting, which would probably mean a price increase.