I agree with what was said before. If you think you struggle with gen chem and the Destroyer really kicked you hard, then maybe the GC Destroyer is a good investment! If you had a good foundation and remembered a lot from undergrad like I did, it may be worth just sticking to the Destroyer. When in doubt, it's better to be more prepared than under prepared - so if you think you may need it, maybe get it just in case. Just my opinion, of course!