I see what Sportys are trying to do, having found me in the FAA CFI database and offering discounts on what is purchased, but I go for the official publication every time. I remember when I started instrument training having Jepps and then one year trying to buy a replacement kit, could I find a stockist? Now individuals must have a subscription - even for training?
The fact that the FAA materials and NACO charts, DUATS are pretty much free is amazing in this day and age. And while they might not be as shiny, and exciting, do ensure you know the basics. "But the Jepp book says" is not what the DPE wants to hear at any level.