C. Conway
I've tried other cards going back to when Compact Flash cards ruled and every single time I wind up coming back to SanDisk.  Why, because they won't certify a card at a certain speed unless it can sustain that speed and every single SanDisk product I've ever owned has lasted, and lasted, and lasted.  I have QUIT using SanDisk products because it just didn't make sense to keep using them (256mb and 512mb thumbdrives and flash cards... they still work... REALLY slowly... but they still work fine... but what the heck do you use them for?) but the only times I have ever had a SanDisk fail I could trace the failure back to something other than a fault in the SanDisk product soooo... I buy SanDisk because I ALWAYS get my money's worth.