Since Maddy has often gotten into my chips and eaten some (she favors BBQ flavors of corn chips and potato chips; interestingly, so did one of the dogs we had - with added dill pickle dip in his case, if you please), it would not surprise me if she were to sneak a chip and at least try it. It's a fact that french fries are among the foods I've had to keep away from the cats over the years, either because they liked to eat them, or in the case of Gussy, play hockey with them (french fries became his new prey after a disastrous attempt to catch and kill a bee; it stung him and his paw was swollen to half again its normal size for a few days; this was in the summer of 1994).
I am not, and have never been any flavor of potato chip, so your second question doesn't apply.

She'll jump up on me when I'm eating egg salad, pizza, pudding, cheese, or fish. She expects a share of those, but doesn't often get it.
My honest opinion is that potatoes & gravy-flavored chips are great. If you have the chance to try it, you should. It's a pleasant, savory flavor that pleases the taste buds without being overwhelming. Or at least that's what I remember of the Lay's version. They also made wonderful pizza-flavored chips, that were very different from the stuff Pringles has.