Might as well buy a huge bottle of caffeine pills for a few bucks. The additional L-Theanine is in almost every EEA product, and most people only need to supplement B6 or 12 like vegans/vegetarians and are deficient. Otherwise, you get a combination of B6/12 nutrients from chicken, fish, meat, eggs, diary, etc which most of us consume.
If someone wants to pay $25-30 for that, go for it.