You also get a couple of different cams - Cam 4 and Cam 6, which change the feel of the pedals. I settled on Cam 6 for myself.
It's been long enough that I can't tell you the exact reason why I liked it over 4, but I do remember I like the center detent better.
Throughout history, poverty is the normal condition of man. Advances which permit this norm to be exceeded — here and there, now and then — are the work of an extremely small minority, frequently despised, often condemned, and almost always opposed by all right-thinking people. Whenever this tiny minority is kept from creating, or (as sometimes happens) is driven out of a society, the people then slip back into abject poverty.
This is known as "bad luck.”
-Robert Heinlein
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