I'm running a half-dozen or so 20 Mb Focus hard cards pretty hard in the lab in both GS's and IIe's. We love em!!! I just bought two more and will probably buy another here in a bit. The only problem we've had is one tends to stick when we first fire it up, but it was the first one we bought and we have been using it a LOT. So, yes, I highly recomend them. -John