If the client history will be implemented someday then how about using the console (whic we use for log in to RackNet) for displaying the clients rating and impressions/suggestions.
Here, i come up with simple example:
The idea is to give player guidelines for improving their lab. First sentence can be client's impressions, second can be their suggestions if they weren't completely satisfied. Maybe even break up the ratings into three existing test subjects categories.
Customer support service by UserEcho