(You can get an idea of what they sound like on Razer's site.) With 45 grams of actuation force, they're not so light that you'll make mistakes - and the mechanical keys don't require so much force that your fingers tire out. Razer's orange switches are tactile but not clicky, so you feel the actuation but they're relatively quiet you'll just hear a muted clack when the keys bottom out. But once you get used to it, you won't want to type on anything else. If you're coming from a laptop keyboard or a typical slim office membrane keyboard, the Pro Type mechanical keyboard might take some adjustment.
