Portrait photography course pt. 1

Once again I've been really busy, but here is one photo from last weekend's portrait photography course. We had this lovely model for couple of hours in our use (I want to thank her very much). Taking portraits is actually pretty hard when you have to compose your model the way you want. It is even more complicated if you don't have a clear vision in your head how you to capture your model. I had no idea what to expect from this course, so I didn't prepare myself at all before the course, but at least I got one photo that satisfies me. What do you think of this portrait? Colours, focusing, composition or anything, please let me know.