I will warn you about the Linkskey LKW-G553. (Marvell chipset)  I bought two of them to assemble an ad-hoc network for my Windows desktops, and they hang the systems regularly if put in ad-hoc mode.  I've fixed this by getting an access point, but still...

 

Considering the card will be at least 18 bucks (for the airlink101 ones), why not just get a $25-30 access point/router/waffle iron?  The electricity saved will pay for the difference.