It's a decent kit, I've turned the "Robusto" which is Woodcraft's answer to the Havana rollerball.
It doesn't have the refinement of the Gentlemen's pen, and for the cost it doesn't quite stack up.
BUT if your customers want a larger pen that posts, it's probably the better of the few that do (along with the El Grande).
Anyhow, it has plastic thread that require several more turns to remove the cap than an Gent, which virutally pops off with just a turn. I have a rollerball that is my personal pen, and it is good for writing if you like big pens.
That being said, and considering the minimal difference in the cost, I'd prefer to offer/display Gent's over the Havanas. Just more refined and less plastic/black epoxy.