For the first order, I unfortunately get delivered a Silicon Power Elite, which is specified with 40MB read and write 15MB. This card has probably also had the other reviewer (Arne Hoffman) in his hands. After a complaint was a short time later the correct silicone Poer Superior card and had then read the full 90MB and 45MB write. Tested via an adapter on a USB3 port on the PC under Windows 8.1.
The entire data transfer of several GB of mobile (Sony Xperia Z1 Compact) on the SD card was completed within a very short time. Video recording in Full HD, snapshots in rapid succession, loading apps ... everything is going just as fast as if the data would be in the internal memory.