I've flown these a few times from ORD-LAS and return. Yesterday I was on Tail 4711 for it's 2nd ever revenue flight -- it literally did have the new plane smell.

Bird has the new put-bags-on-their-sides bins. Strangely, the bins above my seat in first could still only hold ~3.5 bags, not sure if someone just had a super stuffed bag or the first bins are slightly shorter than economy. Has anyone else noticed the same?

Found the new seatback screens and entertainment systems to be very nice. The crews did mention that the FA Call Button on the screen is right next to the volume controls, so be careful when adjusting the volume.
My only complaint about these birds so far is that the economy bulkhead row seems much tighter than the bulkhead rows on the 737s and other AirBii.