The keys are curved to fit the tips of your fingers, they click when you press them, and you can feel the click.

ENGADGET: Matias updates the Tactile Pro to version 4, announces Mini Tactile Pro keyboard, we go hands-on (video)

To wit, the company's unique oval ear tips fit my ears better than anything else I've tried.

ENGADGET: IRL: Klipsch Image X7i, Razer BlackShark and BlueAnt's Embrace headphones

The oval ear tips are included (I prefer the medium-sized flange ones, if you're curious), and they fit like a glove -- in fact, they fit exactly like the tips on my X10i.

ENGADGET: IRL: Klipsch Image X7i, Razer BlackShark and BlueAnt's Embrace headphones

For total flexibility, all models come with multiple sizes of comfortable ear tips, extension cables and ear clips to ensure perfect fit for every listener.

ENGADGET: Denon outs 2009 line of Blu-ray players, AV receivers and headphones