Those Duracell batteries at Sams go on sale a couple times a year -- I'm not even a member, I paid for 1 day membership so I could buy that AGM battery -- Don't remember the price but it was good enough to make me go out of my way and pay a membership fee
Isn't the Bosch the same thing? Made by East Penn? -- I'm pretty sure I looked hard at the pep boys offering -- The Sams club sale still won out though
The battery has been perfect -- I don't expect to need to use the warranty
I also have some Sears Die Hard Platinum AGM batteries -- the rebadged Odyssey -- those are some great batteries too, unfortunately they where discontinued by Sears a few years ago -- I have 7 in service and going strong at the moment