Took the new Beast to our indoor meet last night. It's an absolute blast to fly indoors! So silky & smooth, yet so precise. Just like a perfectly-tuned pattern ship. But slow-flight is also piece of cake. Hardly any wing-rock during harriers, rolls and it's easy to do slow KE down low! I don't understand the comments about the roll-rate not being fast enough. I moved the aileron pushrods to the second from the innermost holes, and rolls are crisp & quick even at half-throttle. I've flown the V1 Beast in there quite a few times. It's fun, but the Beast 3D is even more fun. It instills a level of confidence well-beyond what I've ever felt with the V1.
Here's some video. Just your basic lazy indoor flying - low & slow circuits, touch & gos, loops, rolls, KE circuits, high-alpha, and a few torque-rolls.