Please, before you buy, check out the Sharon Schamber site on youtube
http://www.youtube.com/watch?v=GdJ3_2-0n3o
and see if you might consider the velcro...i have the zippers, and in many ways they are nice but i have been trying to talk myself into buying the velcro needed to replace this system for that one.... it looks so quick... as is the rail system... if i had it to do over, i would probably buy one of the other 2 newer systems..
http://www.youtube.com/watch?v=gOpPP...4&feature=plcp
the zippers are quick, if they are mounted perfectly... but it took time to get this done... both of the other two systems are so quick to put on that you can re-do in minutes if it's not perfect..