Everything feels* laggy af. I remember with 1.6 and source the reflexes and movements were a lot faster (less realistic unless if you used an adrenaline shot*).
Even firing and gun recoil feels out of place. Will probably give it another go during the week, but I honestly don't think it's for me.
I just have too many memories and history of the good (buggy) o'le days - guess the nostalgia is real?