We only used the SB5 for DS5. We used it when he was 4y7m. He seemed to enjoy taking it. He is a very mathy kid, but also a very verbal kid as well. He doesn't like timed stuff much at all, it makes him anxious. He has gotten better about it in the last several months, but I am not sure if a timed test would have worked as well for him. I can't compare his scores to other tests since this was the only one he took, but he scored as a PG kid which reflected exactly what we had suspected.