That is good to know. I had to go to the SanDisk 64gb SDXC card at 90MB/s to get reliable performance but that costs about twice what you are talking about. Please let us know if you ever get any hiccups from the Samsung card.
The only card which has worked RELIABLY for me has been the SanDisk 64gb SDXC rated at 90MB/sec. They are knid of expensive, but they made my problem go away completely & forever.
I just bought a 70D & the Transcend cards are giving me this same issue. I am considering the PNY (instead of spending on a Sandisk Extreme Pro) and I would like to know if you are still using the PNY Elite card (now that you have several months use...