10CH  I downloaded this program and then saw in the comments that Mac has a similar option pre-installed by turning on certain things in the Sound/Universal Access system preferences.

I decided to try this program anyway, after using the Apple solution for a day.

Typewriter Keyboard is remarkably better... first because you don't have to live with a slow keystroke repeat, which honestly drove me crazy. And second because you can turn off sounds for certain keys (like shift, command, ctrl, option, esc...) and you can play different sounds for different keys (like delete, space, enter). It really is a completely different kind of solution than the Apple one (and much preferred if you ask me).

So, since it's free to tryout, I would definitely give both solutions a go. You might be annoyed by typing sounds on a keyboard and it's not worth the $15 bucks (honestly I'm not sure after only two days if I'll purchase the program), but to say you get the same experience from both solutions is a falsity.  
(Version 2.10)