The title says it all. The card is very convenient for its 128 GB and the halfway fleet speed with its 40 really. For this you should really give 5 stars, because as far as she works the same way as any other card too. So far no problems. The specified speed 600x are anyway only marketing gimmick and say nothing concrete from above the effective airspeeds, so it's good that the manufacturing concrete information makes: Write 60MB / s read and 90 MB / s. Too bad if the card is much slower, so I subtract a star. Because although these values absolutely sufficient for my application, a product description must also comply with the facts and must not promise, as the product does. As I said, although I already knew from other reviews that the advertised 60 MB / s can not be reached, I opted active for this card, because price-performance are awesome and I need as large a card for my Panasonic GH4 that the 100 Mbit / s (12.5 MB / s) can easily write for 4K recording. Even the mode in which s (25 MB / s) are recorded 200 Mbit /, the card without failures works, and though I usually do not use this mode. So I know that I can record henceforth unproblematic 4K with no failures. So moral of the story; whom it does not depend on the actual 60MB / s, which gets here quite a fleet, huge SD card for a small price at which a lot can really begin.
