The concept of Womens Specific Design is better than the exercution. Mindyou you can argue that its just better design for small riders and its not specific to women at all because as a small bloke I use "WSD" handlebars and levers. Some guys are right at home on "WSD" saddles as well.

Now having said all that the point for you is that it depends on how tall your wife is. If she is on the shorter side then WSD may be of benifit but it she's taller than say 5' 4" then a standard "mens" model will probably suit her fine.

Regards, Anthony