Better than previous builds, doesn't feel identical to L4D1/2, but that's to be expected. A lot of people are going in expecting a carbon copy of L4D and that's not exactly what's going on here. It's about AS CLOSE as we'll ever get to L4D3, but because it's a different IP there are differences like ADS, separate melee button, speed of the game, etc.
I played 1 full campaign map and attempted 1 Versus game. Didn't experience any insane bugs, though in the Versus game somehow it ended up just being me and one other dude and there was no one else on the other team, lmao. Didn't notice while being Cleaners, but when we were Ridden we were just hanging out by ourselves, lmao. Another buddy of mine said that a bot was holding an invisible machine gun for him, lol. Seems to be a bunch of random bugs across the board. Hopefully a lot of them are already fixed in the retail build. The bots absolutely NEED tweaking though, and I feel like the difficulties could still use some buffing/nerfing too.
Haven't had any issues with performance, turned off motion blur ASAP, and played with DLSS settings. But it was smooth with a 2080 and I had no issues.
Some people are hating on the beta pretty bad, and it's pretty wild. As always, to each their own! To me, at its worst, I think it's decent if not slightly above that. But the full game experience could be a lot better, especially with a good group of pals.