I used to think they weren't feminine until I got one.
Now I have 2 and they definately do not feel or look masculine in any way.
A fully lined pair of pants that zip up the side is definately feminine.
I find it hard to look good in them, all the details become more important.
The accesories and shaping all have to be better ect.
That simple top that looks ok with a skirt, can look kinda butch with trousers.
I think they can look feminine or they can look like you just arent trying and threw something on in a hurry.
Some women definately can pull it off and look very good in them.
One of the things I enjoy about dressing is all the options you get, so many more colors, fabrics and styles.
So I like trying everything.
I think my pantsuit experiments have taught me how to accesorize better, and they dont feel at all masculine.