I find in design oriented classes bringing in guest critics to look at and discuss each student work to be a great benefit. It gives the student a chance to dialogue with respected colleagues and more importantly get different point of view regarding their design work. The guest's input can be assessed and implemented if the student believes it is beneficial to their project, or it can filed away for further consideration. Guest critics also help students become more comfortable with presenting in front of others, which they will be doing for the rest of their academic and professional careers.