Pros: Small & really does the job!
Other Thoughts: I just wish this would support formatting in UDF file system.
XP has autoruns that can infect flash drives, & formatting in UDF will 100% block all viruses from XP from infecting your flash drive.
XP can read from the UDF formatted flash drive, just not write to it, so it is 100% virus protection.
Vista/7/8 can read AND write to UDF USB drives.
Since 7 doesn't have same problem with viruses as XP, just format your USB to UDF under Windows 7 via command line, then add files using your Vista/7/8.
When you plug it into XP, you can run your programs without worry viruses will infect it since they cannot write back to flash drive.