I don't own Urban Decay Primer Potion or Two-Faced Shadow Insurance. It's a bit to pricey for me right now. I use Mary Kary Signature Eye Primer. Sometimes I use a cream shadow. Well, on Saturday night, I used both. How did it hold up? This is after 8 hours.
Not as good at UDPP or TFSI, but good enough for now.
What do I think? If you can afford it, get those pricey primers, because they work amazingly well, however, this is after 8 hours! I think that MK did pretty well for herself, for the price. (I got it on e-bay for $5.)