I use apple juice when I take creatine. I don't know about "maxing out" after a month of taking creatine without a so called "delivery system". Buying just plain creatine and mixing it with apple or grape juice is just as good as spending LOTS of money on Cell-Tech or other expensive creatine mixtures. Sure you will see more significant gains when you first start using creatine and then level out but steady work outs will only increase your size and strenght levels.
Without getting all technical and in depth, creatine is basically a cell "volumizer". Water retention is the main benefit with creatine, although there are more cellular level benefits, the main thing you will notice is that you will gain some weight and notice some strenght gains.
It doesn't matter what delivery method you use, home made or premixed delivery system, creatine is creatine. Save your money and use plain creatine and some juice and you'll do just as well as the people that spend lots of money on Cell-Tech.
Good luck either way.