Some ideas are interesting other a little less. I don't think that's the best implementation of Supers on D20 (simply because I don't think D20 is the right set of rules for a Supers Game)...
The idea of a class or PrC for archetypes can be a cul-de-sac. Probably an approach like the classes of D20 Modern is more correct (but teh product was released well before D20 Modern). Layout is functional and clear but lacking structure and the pictures are simply put, ugly.