Google Doc Answer Boxes

Based on the post prior to this I decided to see how easy it was to create a document to send to students with answer boxes that expand as needed rather than the always troublesome answer lines that move.  I followed the directions in the last post and it worked as advertised.  I have attached an example below.  If you get a chance to try it out with your classes let me know.  I would like to hear how well or how poorly it worked for you and what else you figured out in the process.

Google Doc Answer Boxes Example