I am going to buy two of the mentioned cards for a holiday next month! And i would appreciate some feedback. Has anyone used this card on an entry dSLR such as the 550D? Do you recommend those cards?? Any feedback please?
Unless these are for parallel backup of each other or are much much cheaper than alternatives I would not recommend 32 GB cards if you can avoid them.
Having few & large cards rather than smaller and more of them risks loss of many files at once. I'd guess without looking it up that RAW + JPG gives you 1500+ images/32 GB and that any JPG mode gives you vastly more. The largest sensible side for a card is perhaps one day of photos except if you take a very small number per day. ie say 4 GB would be probably bearable if you need much less than 4 GB/day.
A class 10 SDHC card is rated at 10 MB/s transfer rate.
I see tenmiles mentions extended download time.
Programs like Microsoft's sync tool allow incremental download of only new files and should have minimal speed penalty regardless of card contents.
Windows only - Arcane magic from the dawn of time: I use an old version of free MSDOS (gasp) XXCOPY which handles this well.
I use a Transcend 32GB SDHC class 10 card and while it works well I have found that with my camera (Rebel XS) on RAW I can take 2820 pictures. If I shoot JPEG the little counter thing that displays remaining images stays at 9999 for a while... So 32GB might be a bit much unless you're doing video, in which case I have no advice for you because I don't do video.
I've heard from several people to get multiple cards to avoid a basket of eggs situation, which you siad you're getting two, and that's great, but I would think that 32GB is a bit much.
Also, I have noticed that if I leave all the images on the card that as I take more and more images it takes longer to download them to the computer. For example, if I have 200 pictures on the card and they all already exist on my computer, then I take one picture and try to download it, it will take a while because the computer has to download all the other ones just to see if it already has them. So even if I have space for thousands of pictures, I download and delete them just to make the download go faster.