The CSAR-T is a lot of knife! I like it a lot. Unfortunately, it spends more time in the drawer than on my belt. Primarily because I'm spending more time in my office than out doing work.
When I do take it along, I'm usually carrying a 303 in my pocket as well. The blade isn't much for fine cutting; think chisel versus tomato. So if I need to open mail or clean my fingernails, the CSAR-T works as well as any shovel you have lying around.
I agree with what others have said about the thickness behind the edge. It makes for a nice heavy duty cutter, but keep something lighter handy for delicate tasks.
The 1/4" hex drive in the handle has come in handy on a couple of occasions.
I have other TOPS knives and their idea (other than the zombie killers) is to make tools, and this is one of them. To that end, I would not change the blade shape.
Ultimately, I parked it in favor of the Marksman. It made more sense to me to not change the blade geometry and keep the blade 'as designed' to use in those instances it would have been designed for. Thinning the shoulder for finer cutting tasks might sacrifice a bit of the durability, and that wasn't a compromise I wanted to make.
So... if you're a Combat Search And Rescue guy or gal, this is a Tool for you. Otherwise you might suffer some buyer's remorse when you can't slice your tomato for your lunch.
It is like a Mayo, or Titanium in that once discontinued, its value will probably soar.
Badass scale 9/10
Utilitarian scale 3/10
Pocketability 2/10
Edge retention 8/10
Mail opening ability 2/10
Door puncture ability 9/10
I must be tired; I'm rambling...