I own a Garmin iQue 3600 PDA, a Palm OS type...The SanDisk Ultra cards were as fast as the Panasonics (or faster in some cases) but some members of the forum had problems with them going bad and losing data...In summary, the Panasonic 512 and 256 cards proved to be the most reliable as well as the fastest as found by the users of the iQue 3600 forum...
I bought the Panasonic 512 MB high-speed SD card to go along with a Panasonic digital camera...The card is working out extremely well the high speed card leads to a very quick response time from the camera, i.e., an almost negligible delay between shots, even for image files that average around 1.4 MB...This is a *huge* improvement on my previous digital cam, which paused for a very significant...