WikiTree's pre-1700 certification isn't difficult at all. If you've been researching since 2004 you should try taking it NOW, without additional preparation. However, the pre-1500 is more challenging, and rightfully so. I've found myself so busy with post-1500 profiles, I haven't even looked at pre-1500 certification. My heart is in the Americas and there are plenty of other people who have the training to accomplish researching European records.