Works OK in my Dell 8600, though the mounting options on this thing are limited and require some creativity for applications such as this (my HDD tray has screw holes on the sides). I ended up using a broken pencil on one end to act as a spacer, then taped it down.
The pins on this thing are fragile so be careful! My laptop requires an adapter that connects to the 44 pins on the end of the PCB and while attaching it one of the pins got pushed in, breaking through the solder. I was able to push it back and it doesn't seem to affect anything, but I just wanted to give a heads up. For what it is and what it costs, I'm not going to knock it too much.
For those looking to use this as a boot device...I paired this up with a 16GB Kingston Ultimate 266x card and attempted to install Windows XP, which took several hours. I ran CrystalDiskMark and while it did fantastic overall, the 4k write speed was just pitiful. That card ended up dieing after just a couple days of use, and was replaced with a Sandisk Extreme 60 MB/s (400x). Twice the price but MUCH FASTER! Seems better than my old 7200rpm hard drive in every way. My old hard drive died, I don't need a ton of space (I have a file server to store all my data), was looking for something more quiet and possibly cooler, so this solution works well for me (for roughly the same cost as a new 2.5" 7200 RPM IDE hard drive). I wouldn't hesitate to recommend this adapter (paired with a with a decent CF card) as a hard drive replacement if you are in a similar situation. Just do some research and keep an eye out for something with a decent 4k write speed (for reference, my Kingston card was ~.015 MB/s while the Sandisk was ~.77 MB/s, and while these speeds are not usually critical for cameras, for a boot device where you will be installing an OS/programs/etc it is very important!).
Edit: After aligning the partition (highly recommended for flash media when installing XP--Windows 7 should handle this by default) the 4k write speeds on my SanDisk card went up to 1.2 MB/s. However I realized that this card is seen as "Removable" and can't be used to install certain programs (i.e. MS Office). I tried another card (Transcend 400x) and it was the same problem (though according to Transcend spec it should operate in fixed disk mode). The slow Kingston card was seen as fixed so it's not a problem with the adapter. So while I was happy with the performance of this adapter paired with a decent card, I decided it wasn't worth the hassle of trying to find the right CF card and ditched this idea for a hard drive replacement. I'm not sure I'd recommend this method for others; it's an intriguing idea but I think I'd either stick to a good 7200 rpm drive, or find a true SSD drive (though there are not many in IDE form--and they are a bit expensive).