For Windows XP Service Pack 3 is additionally need the Windows exFAT driver (KB955704) so that the file system can be read.
Read mixed files (photo and video Canon DSLR) for Windows 7 / 64bit:
Kingston G4 is super: 80-85 MB / sec
Internal SD card reader laptop (Dell Precision M6800): 25 MB / sec
Transced TS RDF5K: 6-13 MB / sec
For me, Kingston is the clear winner, Transced goes back!