I have a similar adapter, perhaps exactly the same. As in the picture in your eBay link, do make sure that the CF cards are inserted the opposite way to each other (i.e. both should not be face up, one should be face up, the other (slave if I recall) face down). I stupidly did this initially, and wondered why HDDriver could not see my slave card. Sure enough I had to order another IDE:CF card adapter because I bent the pins. Pretty stupid thing to do on my part, but then again, it wasn't immediately obvious. However, my adapter works and it looks exactly the same, using SanDisk Ultra cards.
Atari Falcon 14mb, 68882, Dual 8gb CF & Steinberg FDI
Atari Jaguar, Rotary controller, Skunkboard & Cat Box
Atari 520STFM 4mb, TOS 2.06 switcher, OverScan, GigaFile, PARCP-USB, Unicorn-USB, System Solutions MiniS HD, SyQuest drives, ICD Link II, PhatBoy MIDI Controller, Philip Rees 5M MIDI merge box, Soundpool M04, Steinberg MIDEX, SMP II, Emagic Log 3, C-Lab Unitor 2, Combiner & Export expanders