I have a Trident SOG with tanto blade. Other posters have said that manual blade is preferable to spring assist.
I like the knife b/c of the handle and for the seatbelt cutter, which makes it good for those who might argue it's a weapon vs a safety tool (I live in an urban area of IL).
The clip isn't the best glass breaker, but I'm told that it works, and the knife is carried by EMTs, I'm told.
One other consideration is that the blade is approx 3.5 inches which the state statute defines as over the limit in a sense, but my understanding is that IL law is intent based: as long as you're not assaulting, robbing, etc. you're generally okay just carrying it, or even if you should need it for self defense.
The knife I'd really like to get is Cold Steel's AK-47, but that has tactical written all over it, and probably would be more legally risky in urban IL, right? The good thing about this knife is that it has a specially designed pommel which would be great for breaking glass or used as an impact tool.
So, do folks know of other folders that would be good defensively and for extricating oneself from a rollover, etc.?