The ultimate question, of course, is whether or not it’s worth your money. I, and the rest of the P50-loving world, say yes. If you can spare the price, and choose the right formula (go see that esthetician, if you have to!), it will make a huge difference, and you will wonder how you ever lived without it. I do, as I pat it into my skin every night, and then climb in bed and turn out the lights and dream of salt and vinegar chips.