The reviewer does not understand eSATA
eSATA is almost the same as SATA, with two differences:
1) The cable is redesigned for external use, with shielding and mods to ensure hot pluggability is reliable.
2) The interface is designed for hot pluggability. To work correctly as a hot-plug interface, the drivers must support AHCI.
The reviewer thought the PCMCIA card should have one eSATA and one SATA connector. I don't know how to put this nicely: that's ridiculous. SATA interface would mean the drive needs to get power from... what? Nothing appropriate. SATA is for internal drives. By definition, a laptop with PCMCIA requires an external, eSATA drive.
If you don't have any eSATA drives, you need to run and get a couple of Seagate FreeAgent Pro drives. Last I checked, you could buy a 750G drive with 5 year warranty and USB/Firewire/eSATA interface for $130 or so (buy.com). Using the eSATA interface you get 100% internal drive speed on an external drive. Nice. We use several of these for backups. (At that price, we use external drives as if they were ultra-fast tapes

)
Hope that helps!
MrPete