I've never owned a Sako either so I don't have 1st hand feedback for you. However, I've never heard anyone complain about them. Certainly there are others that shoot just as well or better. I guess the only comfort in the guarantee is that if it doesn't shoot that well they're take it back. Most likely that will be w/ a lot of questioning about what load you are shooting and the shooting conditions. And by "take it back", they probably just mean that they'll look at it, reconfirm that they can get it to shoot under 1" and send it back to you. So I don't know that the guarantee is worth much but I have heard that they shoot great.