However the system works best with the nail polish by the Konad company, I have tryed china glaze and it works well not nearly as great and clear as Knoad nail polish...You can buy the nail polish on there website not that bad priced either hope that helped
I find it's not so much the brand that matters, as the specific polishes. A good test is to take out the brush, don't wipe it off, and see how fast the nail polish drips off. If it's not really eager to get back in the bottle, then that polish will probably work well for stamping. (If you have any Konad polishes, that makes it easier to compare thickness and whatnot)
OPI and China Glaze will work really well with the stamping system, but you can really use any kind of polish you want to. For instance, L'Oreal Nail Polish, Sally Hansen, or any kind of nail polish will work.
I hope this helps you and enjoy your new Konad system!