gotta second that one - I've been using the Staedtler Mars Technico
pretty much my whole life (though not the same one, people tend to
steal it *@&**£). Personally I don't like the built in sharpener so
much (even though it's great on-the-go), but you can get a seperate
sharpener that works super well (and is super cute to boot). If you do
a lot of drawing/sketching/draughting etc, this pencil is unbeatable.