Reply to express 34 usb 3.0 mbp late 2008

ok as the title suggests i'm considering picking up an express card 34, usb 3 for my late 2008 15" mbp,

i have seen ones that stick out but i'm interested in the slim flush fitting cards that could just be left in the slot.

i used to have one similar to this on my windows laptop

http://www.ebay.co.uk/itm/COMPACT-SH...item1e77dca90c

but was wondering if anyone had tried them on osx and if they had any issues, i use ssl & at most gigs link cdj 2000's by usb, and i'd just like to get rid of the external hub