It appears that the notion of the importance of feedback in improving performance is less widely accepted when it comes to soliciting students' advice for helping teachers improve their skills. We are thinking about how such a system could be successfully implemented. This may be a topic others are interested in, so keeping the discussion public might be useful.
Most students choose to fill it out.
It has helped me tremendously in management of workload and subject matter. I also asked older students that have taken my courses earlier in their education to evaluate me and the courses candidly so that I can gauge how they feel about it once they have had real opportunities to use the material. I actually find the later part more helpful. Of course the kids want a lighter work load, but obviously that's not always in their best interest. Add comments wherever appropriate.