Very easy. Digital check in, no hassles. Super-friendly staff. Paid drink service only, no movies, TV's, or monitors to distract the kids with, plus announcements were made in Japanese language only (I can understand and my wife is Japanese so no problems for us) so if you think you will need assistance in another language, think twice.
The flights were smooth and there were no delays, so there were no unnecessary and bothersome announcements from the cockpit.
I am a 6' heavy-set American, and this flight was very comfortable with plenty of legroom and comfort. I slept very well, which I usually don't do!
I will definitely use this airline again for domestic flights and would recommend this airline to my friends for domestic flights. For international flights though, Osaka Kansai Airport is a really easy international transfer hub so consider that when planning your next trip.