I recently purchased this keyboard from Amazon. I have been brushing up on  my typing since, I'm not working at the moment, I have some free time. 

I figured an ergonomic keypad would be an asset in regards to gaining speed. Boy, was I wrong. I can't type for shiznit.

I'm not sure if it's due to the keys being so low or if its the design. I am returning this one, and have repurchased the one below. 

I am hoping that the higher keys will make a difference. I will post my finds.