I have used Kensington, Transcend, rvrn Monster brand recently, as I have Sandisk and Lexar. I have had a Lexar fail and Transcend fail, and they all can fail. These all are perfectly fine. I've been shooting with them ever since the Nikon D40-D70, and remeber then switching to the 10D Canon.
I'm under the impression that not a bunch of companies make these, yet brand them to specs the brands request.
Most impoirtant thing for me is that the specs are there. If the specs meet the claim, and it is a brand name with Life Time watrranty, I buy it. So far the Transcend, Monster and Kensigton in 2-3 cameras have been perfectly fine. Only time I had an issue was when I swapped a card between a 1D series to a 5D, and it corrupted the card and most images. That was a Sandisk. The card was not at fault, as the 2 cams write different types of raw files. I have dents and even got the cards wet at times, and dropped them a bunch of times.
The 32GB transcendand Monster UDMA 7,6 500x were around years ago $50. life time warranty.