I have the Leupold QR rings/bases. Like Randy says, it just makes cleaning easier..though I'm not sure that applies to an Omega
The main reason I did it is close-range hunting. I took a scope in the forehead a couple seasons ago snapping off a shot at a doe spooking directly towards me at 40+ mph! I prefer open sights when shots are likely less than 100 yards, so I remove the scope for woods hunting and keep it in my pocket until I get to the open field again.