Transcend openly admits that are used here in the 133x Series MLC chips. Standard Transcend SLC are the longer are durable and faster in theory (and used in the 266x series). However, the durability seems to be a problem here, Transcend offers a 30 year warranty on the map. In addition, the durability issue is likely anyway only for industrial applications have relevance where it is a serious matter if the 8 GB now 1 million times write / delete join or 2 million copies. When Otto normal private user you will have to make in the embarrassment about it thought probably never come.
For Speed: I have this card with a Sandisk Extreme III can directly compare, and at least for me, the Transcend is on average 0.5-1 MB / s faster. They work fine in all readers and my Canon camera. Even if you "only" as fast as the SanDisk would, this card is for her price is still the clear favorite. Here's price and performance, hence a strong buy recommendation.
A small tip: At the moment, the 8GB card is the with the best price / performance ratio. It costs only 8-10 euros more than the 4 GB version, but has twice the capacity.
