I rented an 80-400VR for a few days a couple years back when the Trojan Nuclear cooling tower was brought down and it makes a big difference. You're able to get 1 - 2 stops easily. If 1/125 would have been the slowest shutter speed you could have used you're able to use 1/60 or 1/30 fairly easily. There's 2 different switches on the lens, one to turn the VR on and another to choose which mode. One mode compensates for vertical movements, allowing you to pan, and the other works in both vertical and horizontal. I didn't know what to expect the first time I turned on the VR but I walked away a believer. If I had the money I'd own a few VR lenses.