FW400 ExpressCard compatibility

Is this card good or it has compatibility problems with your gear?

http://www.sonnettech.com/product/fwusbexpresscard34.html

The problem is that I don't know what chipset the Sonnet has.

What about this one (TI chipset, Mac OS 8 and above):

http://www.lindy.co.uk/firewire-usb-2-combo-3-port-expresscard-34/51501.html

Well, now that USB 3.0 cards are out, maybe I'll hold for a USB 3.0/FW400 combo card with a Texas Instruments FireWire chip.