I have been using this for a while now. I like it because it means you get it right while you are still on site.
I have found the IFC import buggy but if you open the IFC directly into archicad (i drag the IFC and drop it onto my archicad icon) the windows come in correctly, I then just cut paste into template.
Also you will want to merge walls as they come in broken at each junction.
I have been very impressed and am considering buying the pro verison.
This post is me asking questions relating to solving issues I had with the IFC import
http://archicad-talk.graphisoft.com/viewtopic.php?p=205517&highlight=#205517
Highly recommend the samsung galaxy note 10.1, I found having a stylus makes the use of this software even better
The basic version, which I have been using only costs about $15, not a massive outlay to try the product.