Why pay over 4x the money for a so called correct memory type when they might, if you're lucky, get you 2x the usage? There are people that have problems with so called correct types, so you can't say they are flawless. I am not saying these are flawless either. If it works, use it. If it doesn't work, don't use it. 20 plus cycles with not a glitch, I wouldn't call that short term. The SanDisk A1 is a pretty darn good card, some manufacturers even recommend them. Besides, the larger the card, the less wear and tear on the card due to less write cycles.