I've downloaded and installed it and at the moment it seems to run quite well with minimal system impact, (TaskManager shows 0 CPU across all its processes), chews about 70MB of RAM with kwatch.exe grabbing most of that, (54MB).
Now to see if it impacts my online gaming 
-4wd
Kwatch uses alot of Ram mainly because it is checking all processes that are accessing files and checking what they are doing, In this way it can catch and stop unknown malware.-Davidtheo
Unfortunately, it missed picking up a couple of dll's as
Trojan.Vundo but then again so did 14 of the 22 virus checkers on
VirusTotal. I'm just lucky I don't have an
installed browser it could pollute, (Portable Firefox only, IE has been expunged from the system). I'm pretty sure it was there before I installed KIS9, so my previous AV didn't pick it up either.
However, the Anti-Spyware did highlight that an unknown dll was one of the Startup Items - so that pointed me in the right direction to remove a few dlls and ini files via an external
LiveXP HDD.
What online games do you play?
Pretty much only
Joint Operations these days, it may be rather old compared to the likes of COD4, GRAW2, etc but it's a lot more fun IMHO.
Otherwise, Solder Of Fortune 1 + 2, Quake, Quake II, etc - all the good old mindlessly violent FPS games

EDIT: Two things that do annoy me though is there's no way to resize the Firewall application window or to sort the programs in the Application Rules list.