After taking the back off our Maxi Cosi Rodi seat for DD to let her sit on the Booster seat, we now think that she would be safer with it back on!!! Have heard that these seats haven't performed very well in safety tests but would like to find out more. Have found the Which online site but being a cheapskate I don't want to pay!! Does anyone know where I can find some info about safety at all?? Thanks!