I use PNY.
I have a 16 gig 30 mbs for shooting on my t3i.
And a 32gig 20mbs for recording on my tx10
I used to be all about Sandisk, but after going thought three of their cards, I switched over.
One of them got corrupted and is unable to reformat, the other somehow lost all of its data( this sucked, I lost a ton of pictures) and the other is permanently locked and can't get into it at all. No problems with PNY yet.
What makes my car.