I received this as a gift from my wife, after her listening to me complain how crappy my old epson projector was looking. OMG, the difference is amazing, now please understand I'm not some expert so don't expect a lot of technical jargon. The picture is superb, the most notable are sports and movies. I see a lot more detail. The 4K enhancement is very nice and adds a noticeable difference from 1080p.
My 2350 is ceiling mounted 10' from my screen, which has a 1.3gain and 100" picture. It is a dedicated theater room. The lumens are bright enough that I can have all my basement lights on and still be able to watch but naturally better with lights dimmed or off.
As for calibration, all I did was search YouTube for projector calibration. I calibrated contrast and brightness through a video off of YouTube. I removed the android dongle and used my Roku streaming stick 4K, used the 2nd HDMI eArc port and ran HDMI cable to my Samsung hw-q850t sound bar w/sub and satellite speakers complete my set-up!
I love this projector, but I still love my wife more!