My wife is. She hates that she bought a Max, but fortunately they're letting her return it for a full refund. Too big, the color shifting too noticeable, and all things considered it was stupidly overpriced for what she got. The XR isn't much better in the price department but we are able to get 128gb versions which is better than the jump in price from 64 to 256 on the Max. Much better battery life is a huge plus. So for a savings of over 400 dollars she's getting a phone in a color she adores (yellow), a longer lasting battery, and much cheaper.
After using her Max, I never considered getting one. To me it frankly isn't worth the price and I'd feel stupid paying more for an iPhone than I do a MBP Retina. The XR is the perfect middle ground. Performance, battery life, and a great camera.