The Acard work very well but are obviously more expensive than other (usually older and either used or hard to source) adapters. I'm using many including an AEC-7720U in a rackmount 1U Amiga 1200 with Blizzard 1260 and SCSI, a 7726H in an Amiga 4000 with CyberStorm Mk III, an AEC-7730A SATA to SCSI in a PowerMac 9600, and an ARS-2000SU 2.5" SATA to 50 pin SCSI enclosure in an Amiga 3000.
I prefer to have new drives which are generally more reliable and take less power (particularly in the case of flash disks or 5900 RPM "LP" models).
If you want to use an IDE to CompactFlash adapter, they're an iffy lot, so I highly recommend you pay a little more and get one that definitely works with DMA transfers (which may preclude using really old cards, but considering the price of a 4 gig CF card these days...) Addonics is a good, high quality but not cheap adapter.
I did some tests with an Acard and an Addonics which I posted here:
http://68kmla.net/forums/viewtopic.php?f=7&t=12050&start=50#p123985I hope this helps.
