Pros: The cost was low per GB, and the UDMA and fast speed made it perfect for my Canon 7D. Bursts are pretty fast and video is no problem. Used it for a fashion show and a press event with a lot of politicians with foreign dignitaries (so critical that I get the shot) and no issues. This card replaced 4 cards I usually carry, (2) 8GB Lexar Pro (gold foil), and (2) 8GB Sandisk Ultra II. Coming from those UDMA high speed cards, this Transcend is actually faster. So far so go...
Cons: The only thing that really had me wary and worried was reliability as a few here in Jan 2012 have reported dead cards or unreliable storage. As soon as I got mine I filled the card, MD5 verify, format, repeat. After 3 cycles filling up the entire card I was convinced I had a good one. For those wary, I suggest doing this process when you get it before you use it for mission critical shoots.
Cons: Performance is nowhere near what is advertised. After noting slow performance in my Nikon D 300 S, I benchmarked with ATTO and with flash memory toolkit. The memory tests at a maximum of 20 MB per second write and 32 MB per second read. This translates to 133X write speed and 200 X read speed. I am very disappointed and am returning to Newegg.
Pros: My first Transcend experience was w/their SD cards for my T1i. Great $, great performance, great reliability and durability.
Cons: Sort of as another reviewer said (about price drop right after purchase) - New Egg has the "month long" Black Friday promo discount for flash memory cards as I type this and... Rats, just bought my third 32GB card a few days ago. Luck of the die - or calendar.
Pros: I liked the cost of this card and it certainly seems to work in my rebel XT. I can see the card on my PC and a Mac with a regular card reader.
Cons: I bought it for my finance's new D300S and it seems to register on the card and I can format it. The problem is any picture taken is all black (R=0, B=0, G=0). The Nikon D300S just does not like this card.