So what is this thing capable of? How does it compare to others?
Two words......Vastly Superior.
How about this? It has successfully dropped a "Bunker Buster" bomb while flying at supersonic speeds, hitting its target with deadly accuracy. Translated, the terrorists in the bunkers won't hear anything when they are blown hundreds of feet into the ground.
Factsheet on f-22A Raptor :
http://www.af.mil/factsheets/factsheet.asp?fsID=199
Against all other aircraft, this thing close to science fiction. Mach 1.5+ without afterburner. Electronics that act as a second crewmember. Vectored exhaust and can turn on dime at high speed/high altitude. Stealth. Radar is almost undetectable and can be used to jam opponents. Supersonic release of weapons.
And that is just scratching the surface.