I have a spider with a mediator 1200SX works
good in USB 1.1 mode in USB 2.0 mode somewhat flakey. I currently use the older 1.1 drivers as the new 2.0 drivers are hit and miss.
Elbox seems to update drivers on a regular basis so hopefully in the next update it will be corrected.
I know that really is not much help to you. I only use it for transfering images from my Sony Camcorder and Canon Digital cameras so for me it works great for what I need it for. At $40 dollars it was " Cheap " for an Amiga USB card.
Kurt