after using one for 7 years I have arthritic pain in my knuckles. your cartilage carries the brunt of the force when you key bottom.
now I have a kinesis advantage (mechanical keyboard) with rubber o-rings. once you learn, you stop pushing down before you hit the bottom, ergo no wear on cartilage. Also, minimal stretching to move pointer finger out to the middle keys.
several of the staff at AT have developed pains from typing. considering this is likely how you making a living (computer work), it's probably wise to proactively protect your hands.
here's AT's review