i have a 10 year old no-brand keyboard - no matter how many times i punched it with frustration (I had a P1 60Mhz up to 2 years ago, so, as you may guess, it happened frequently), how many essays i typed, or how many messages ive sent, its still beating.
I really love the way its keys respond - they kinda need some pressure to start going down, then they go down by themselves, if anyone knows what i mean. When i try to write on a modern keyboard, my typing rate is much reduced because i don't 'feel' the key.