I've had a Transcend 1G 80x for about a year. On my PDAs and Cameras, it seems to be as fast or faster than their SD interface, so I dont see a need for 133-150x in my usage. (not to mention sporadic reports of timing problems with some devices and 133x+ cards). I just picked up another one of these last week. The only other card I really liked is Kingmax, but I dont see them selling anything larger than 1G these days, seem to be disappearing. Anyway, Transcends have been good to me and seem to operate at their advertised speeds.