So far it works great with Windows XP. I am using Transcend's HC class 6 4GB SD card.

Have to stop and start every time to get weight for a different person.
The manual is not very helpful. It took forever to figure out how to use it and I am still unable to use it correctly.

Bought this one after my camera's usb connection broke and almost hope it broke earlier. This thing downloads my images from a CF card at least 4 times faster! Also SD & Micro SD are working great. Drivers are not necessary on windows XP. Used with several computers without any problem.

There is an old saying among engineers and designers:
"CHEAP, FAST, GOOD - pick any two"
It is very rare that we can get to pick all three - as in this case.

I purchased this item (Transcend M5 Multi Card Reader) because I need to read/write high-capacity SDHC cards, and my old card reader (Lexar Media RW022-001) is unable to recognize them. So far, I have tested the Transcend M5 with many different brands of CF and SD/SDHC cards, and it worked flawlessly.

Just for fun, I also benchmarked several CF and SD cards in both my new Transcend M5 and old Lexar reader. I'm surprised to find out that the card reader actually makes a big difference in the data transfer rate.

For example: when I benchmarked the SanDisk 2GB Ultra II CF Card in my old Lexar reader, I received a rather disappointing write speed of 4.1MB/S (equivalent to '27x'). But the same card in the new Transcend M5 gave me a write speed of 5.9MB/S (equivalent to '40x'). That's nearly 50% fast data transfer rate! Other CF and SD cards tested also showed similar performance boost.
(Note that Sandisk claims the Ultra II CF is capable of 15MB/S, but that's the maximum speed under optimal test condition)

In summary, the Transcend M5 card reader is very inexpensive, gives much faster data rate than my old card reader, and seems to be very well-constructed. That makes it an excellent buy in my book.

I bought this because I needed something that would read SDHC cards. It does that well and fast. On vacation a friend with a Sony camera wanted to download pictures to my computer to email. We couldn't get it to read the Sony card, though it's within spec. Tried the usual rebooting, etc. I did NOT download or use Transcend's software.

Now that I'm home, I don't have the Sony card to troubleshoot or call the Transcend people.

I still rated the unit a "5" because it's small, light, worked well with the SDHC card and other Transcend products I've used have been flawless.