You ought to give it a try. You might like it. Assuming you don't smash your keyboard first. (Tip: Casual Mode is not actually any easier. You will still get raped eventually.)
Yes I have, I love the military base in the second one. I had each of my guys with some awesome gun, an M4A1. AK-47, UMP .45, a hunting rifle, and me with he M249 SAW and the RPG-7.