I was blown away by when I started instant action. The graphics are everything you might wish for. Being shot at close range by a Mad Cat was such a thrilling and beautiful experience I almost forgot to return fire. Cities LOOK like cities, trees like trees and mechs look like the lumbering behemoths they are. Night fights have an eerie quality as mechs are seen only by the glow of their weapons and the flash of yours.
City fighting can be very spooky as mechs suddenly appear around buildings.
There is nothing like the sensation of walking around in an Atlas in full battle, as you look down on the puny mechs below you and blow them to shreds. If you have a force feedback controller you are thrown about by the recoil of your own weapons and the impact of the enemy's. Targeting feels so good and so right as you automatically target what you aim at. Weapons sound so totally cool. You can hear the servos engaged when you turn or change speed.