Sorry you've had such bad luck in the past. Don't give up! And don't get discouraged when things break or go bad. It'll happen to everyone at some point. Technology is a pain like that. Things'll break, get dented, dirty, whatever. Bags and cameras are replaceable. Photos are not.
LOL, I don't really think of zippers as technology
Add me to the list of folks that had the Slingshot and was disappointed.