You mean the new SATA version?
No I've got the current model (the Mrk2), makes a big difference to running heavy games on a 1200 (4.2 MB p/s transfer rate).
I have the FastATA hooked to a dual SATA adapter, and get little over 5mb/sec, but I still might be interested in getting the new SATA IDEFix express. Maybe... i dunno..
Actually what I need is a cheap way to convert the blizzard SCSI to SATA...