Got mine in the mail today.
First thought was "It's bigger than I expect... oh, they. They are bigger than I expected." Turns out I'd ordered two copies of the beginner set and forgot all about it.
Still, the box is big in a way I find satisfying. I was actually expecting something the size of the old lance pack boxes and dreading the shear amount of folding that would require.
The box art is lovely. I especially liked the touch of "Kurita" spelled out in Katakana on the Griffin. It's totally nonsensical, in a way that calls back to battletech's nonsensical past. :P
For some reason I was expecting two mapsheets per box, so I was momentarily disappointed, but when I thought about it I couldn't recall anybody actually promising two mapsheets, so I have nothing to complain about.
The minis and the cardboard standees are all very nice. I was hoping for a little bit more variety in the included terrain cards, but forests work.
Also, it had that new boxed set smell, which is great.