We get a (to me) surprising number of emails questioning whether you can use an 11 speed hub with a 10 speed drivetrain. The answer is yes, I've done it every time I've used my road bike for about a year now. Let me illustrate with a picture I stole from the internet:
The keen-eyed observer will note a thin (1.8mm thick, to be exact) spacer ring on the inboard end of this cassette body. If you are using this 11 speed hub with a 10 speed drivetrain, keep that spacer on when you install your cassette. No re-dishing of the wheel is necessary. No adjustment of the rear derailleur beyond what you might expect when going from hub to hub (i.e. may be a click or three on the barrel adjuster) is necessary.
If you are using an 11 speed drivetrain with this hub, simply remove the washer before you install your cassette.
As G-Love said, yeah, it's that easy.