It's the best trackpad out there, and all trackpads are clunky and non-ergonomic. A mouse, keyboard, touchscreen, or almost anything else is better. Due to the location of a trackpad you are guaranteed to have your wrist bent which limits how long you can work before discomfort.

I consider trackpads in general to be 'clunky' (not as easy to use) to use relative to a mouse.

Haha, I wrote that on a whim. I'll come up with a better line.