the keys need to be shimmed so you don't have to push them down too far thus avoiding strain on your hands and fingers. If you are working in a court room all day or writing depostions you will greatly appreciate keys that are shimmed. But now along comes the Light Speed. You barely touch the keys and this baby just takes off. You use a very light touch. When you are typing your hands barely move and you gently touch each key so there is no strain at all. The real beauty of this is that each key can be adjusted individually to suit your typing style. And there is no need to send your machine away at a considerable cost to get it shimmed. You can easily do this yourself via your computer!
If you are considering going into court reporting or are thinking of buying a Light Speed do yourself a favor and check it out. It's better and cheaper than the other writers.
I'd also like to say that I am not a salesman for the Light Speed or for Stenovations that manufacters it. I just love it a lot. ;D