The Para (more than any other knife I have tried) has shown me how light a knife can feel (both weight and action) and still be among the strongest knives out there.
The knife feels very light in hand considering its size, but it is quite rigid. This is not to say that there are not stronger knives, but you will likely see a substantial weight gain associated with a "stronger" knife.
The blade is a great balance between strength and cutting/slicing ability. The lock is very secure, but it offers very little in feedback (very little drag during deployment, very little noise on lock up, yet remains among the strongest lock designs on the market).
The only negative I have is the notch in the blade tang. It is rounded now to prevent it biting you, but it has snagged the top of my pocket and hampered my draw (I am not a ninja or anything, but when I want a knife, I want it now).
Honestly, I have often wondered why the Para is not more popular.