Not migrating yet to W10 until Microsoft clears up how OEM licenses work. Currently I am looking at a worse-off situation because upgrading parts in W10 is going to destroy my license and going back to W7 is not easy, or so I read, it has a limited time period attached to it.
I am only upgrading when these issues are straightened out or until I feel W7 is lacking features. So far so good, don't feel any need to get W10 yet. There are too many inconsistencies and early adopters risks involved even though it seems to be a pretty decent OS.