I suspect a lot of people don't post about their good experiences as that's what they expect and hopefully receive. I found the Stinger a very positive car purchasing experience. Once I'd made it clear where I needed to be on price after keeping a couple other dealers in the running, they met my price target (all-in, no flim-flam with extra fees, etc.) and we had an agreement within a few days. I made it clear, once, that I didn't want any dealer add-on warranties, protection packages, wheel and tire insurance, etc. and they respected that - no additional pressure.
Car was well prepped and detailed on pickup, filled with fuel, and the salesman was about two hours into his detailed explanation/demo of every conceivable car feature and menu option when I called it off due to my ride/accomplice nodding off in the parking lot waiting for me to emerge.
I was too late to have them save the window sticker when doing the PDI/detailing, so they contacted KIA for me and had a brand new window sticker generated for that
VIN and shipped to the dealer to pick up. Although a couple of early service concerns were initially rebuffed by KIA Canada, the dealer kept after them and made sure they were addressed to my satisfaction. Communication has been excellent, and service visits have been prompt, courteous, with quality work performed and the car protected and returned in as-new condition.
It helps that the dealership is new, with a clean, large modern service shop, a separate enclosed drive-through service check-in bay, a spacious waiting lounge, etc. But the people are a huge part of it, and everyone from the salesman through to the service manager have been personable and professional to deal with - and of course treated in kind.
A very good dealership experience overall.