From my experience, there are issues coming out of hibernation with the BU-353. That's why I went with the BU-355. Altough....there's a few guys on the threads that claim that they resume without any problems with the 353.
I think pretty much all of them don't resume every time, unless you close the nav software before you hibernate or reopen the COM port when you resume, which works most of the time, but not always.
__________________ XPort 1.26 -GPS port splitter, logger, and USB device resume fix