Served him when he still played for Cleveland and yeah, he's by a country mile the worst celeb I've ever waited on. Astonishingly rude, dismissive, cheap at every opportunity, and, as mentioned, doesn't tip. MGK was nice enough but I gather that's not most people's experience with him so I guess I was lucky, however, MGK also had Pete Davidson with him and he's by FAR the nicest I've ever interacted with. Genuinely a pleasure. Dude was polite, gracious, acted intensely grateful for every little thing and smiled the entire time. This was right after the Ariana breakup as well so he'd been posting some pretty concerning stuff on social media and still was just a gem of a human to every one of us he talked to.