Have had this card about a month so far and it has performed well. I generally use it as portable storage for my netbook, particularly as I can download several videos onto the card for playback later on my break while working nights.
This card is rated as a class 4 product, which means a minimum of 4MB/sec write speed. I can't claim to have tested that, but when transfering data on a Windows machine the data transfer rate generally fluctuates between about 3.8-5.5MB/sec, depending on what's being transfered. For a camera, particularly newer ones with high megapixel sensors, HD recording or RAW file output, this speed may not cut it, but for the purpose of simple data storage this is more than adequate for me (I simply drag and drop and go and do something else as the data is transfered). Good value for a large, basic SDHC card.