I hear a lot of people that have CO2 pumps and carts. that they bring along on rides... Why don't people get mini pumps instead? Am I missing the disadvantages of mini pumps? You don't have to spend money to buy the replacement carts...

I am thinking about getting this new pump by Topeak. Very sleek.

http://www.topeak.com/2006/products/...rorocketal.php

What are the reasons behind your choices...