This is a natural fit - Shakespearean great Kenneth Branaugh, coupled with a fantastic, mythical realm, it makes perfect sense to give a solid launchpad for Thor and his relationship to our world. Hiddleston begins his reign as a pitch perfect Loki.
Strong, and gets stronger to me with repeat viewings. Another 15 minutes wouldn't have hurt.
Hemsworth and Hiddleston carry a difficult mythos and knock it out of the park.