MPG is great!
I bought my '22 Accent SE (base model) in the end of June 2022. So far, most of my driving in it has been city miles, but over last weekend, I took it from Charlotte, NC to Lansdale, PA; a trip that was roughly 1100 miles round-trip. The overall physical comfort of such a long-distance road trip in this subcompact sedan was unexpectedly around a 7/10.
The only major discomfort was the road noise, which is noticable no matter what speed you're at, but gets to be unbearable at around 60-75 mph, which is the average highway speed limit around these parts.
The only other complaint is that you'll hear every rock that gets kicked up into the underside of the carriage; the fascias and quarter panels are, unsurprisingly, made of plastic and or fiberglass, and therefore not wonderful in terms of sound deadening compared to earlier models.