Very quick initial impressions:
Assembly was a breeze. Chair backs locked easily into place. Escapes are heavier and much more solidly built than my previous Berklines. Sitting position is much higher than the berklines also, I knew this from previous owner reports. I am 5' 10 1/2" 190 lbs and my feet don't touch the ground when chair is upright (not reclined). I rarely use theater chairs in upright position so this is no problem for me. They are a bit more narrow than the 13174's but I knew this from the specs.
Comfort is much improved over the Berkline's. More firm for sure. The most comfortable position for me is with the foot fully extended with little to no chair back recline. In a fully reclined position the lumber support isn't quite as good but still comfortable.
The chair backs seem shorter than my Berkline's (haven't checked specs on chair back height) but the adjustable headrest more then makes up for it. It is a fantastic feature. I am not sure I will use tray tables that much but they are more sturdy than I would have imagained with good weight to them.
I am pleased with the quality of the full leather/vinyl combo. It's not as soft as the bonded leather, but I think it will last better long term. It was upholstered well. Stitches and seams looks good. The controls will take a bit of time to get adjusted to but no complaints there. The cooling cup feature wasn't as loud as I expected given the feedback here. I won't use it very much as I almost exclusively use Tervis drinkware. I have yet to test the USB ports.
I made a boneheaded mistake when I was wiring the buttkicker advances. I didn't pay attention to the fact that the buttkicker binding posts are spring-loaded posts. I unscrewed one of the posts and was unable to screw it back on and had to completely remove the buttkicker to fix this and remount it the plate. (It was after 1 am, cut me some slack)
FYI, I would recommend to just self-install the buttkickers. They are super-easy to mount (4 screws). Roman told me this up front and I should have listened (I could've gottten my chairs 6 mos ago).
Can't really comment on the buttkickers yet. I only confirmed that they were receiving a signal. It was too late to test. I am going to first test with low pass off and high pass at 40 hz with volume (gain) at 1/4.
My only very small issue was that there was an identical impression/indention in the leather near the bottom of one the chair backs and the back of one of the seat cushions. It looks like a double square or double diamond impression. It is most likely a piece of cardboard or paper that was lodged in between the two during packaging. The impression on the seat cushion was not visible this morning and hopefully it will disappear on the chair back after a little usage.