I was pretty disappointed...
I was pretty disappointed with this pencil. The eraser cap was VERY loose
fitting (thus perpetually falling off), and was conclusively lost within a week.
The build quality and finish are OK but not excellent; more suited to a $12 or
$15 pencil than to one that costs $23. The pencil jammed after a while (as many
will), but unlike other pencils, this seems to require constant disassembly for
cleaning of various problems. And the disassembly is complex, owing the the
multiple mechanisms. The adjustable sleeve length and lead-advance may be useful
to professionals who have to use guide rules. But for other people, they create
a level of complexity that isn't worth the time you spend removing lead jams.
For every hour of use (due to the nature of my job, I write in short bursts, so
this is maybe 15 minutes maximum of continuous writing), I need to spend a good
2-4 minutes fixing a jam. The guide pipe also is much trickier to clean than any
other I've come across, though I can't quite tell why. If you are using this for
making precise lines with careful pressure (e.g., technical drawings), then it
may be worth it. Everyone else, stay away!