So far, A18 is living up to the hype.
The zeds snuffling about at night, very very creepy. Nope, t'ain't goin' out thar. nope. nope. nope!
Enrage: just nasty. got me kilt once. mumble.
Feathers: lots of them, just hit EVERY bird nest, I'm doing fine on those. Takes a LOT of arrows though to kill stuff.
Spear: love it.
Performance is fine, no real difference I can see from 17 on linux, with most things cranked up. A few odd things to be expected in an E release. (crash talking to trader, etc)
Music system is nice, still fiddling with that. Spending a lot of time trying to decide where to put points. (40k for fergetting elixer? fergit that!)

Overall, looks great, plays fine. Have to see how first horde goes. (gonna get munched, I just know it)
Oh, got food poisoning once already, barf, yer starving, and then had to eat up all the rest of my food to get back to normal. (day 2)
Don't like food poisoning. Took a point in Iron Stomach after that. Lotsa meat, lucked out with a pot and grill on day 1. THen got killed with the grill in the road chest (that was the stupid boar. got him and his brother when I went back)
First time playing without mods in a long time, and so far, 2 thumbs up an a shaken fist at ya!
Well done. Worth the wait.