The Patriots just seem to always get the better of negotiations. Some of the earlier trades didn't even have the value of the Patriots/Vikings trade so I don't assume we were given the same offer.
However, most mocks I saw had Sly going much earlier, so this is a long term defensive contributor that they wanted. We have short term contracts on the interior of our line, so this seems like a very solid decision if that's the kind of player they imagine him to be.
If he becomes a long-term anchor at DT, I have no problem with passing on the other picks. Time will tell.