Only had a few hours on it but i'm very impressed so far, I've had a MK1 since 1.6, didn't bother with MK2 or the Studio
It feels as well made if not better than push 2.
You really can use it without the mouse and keyboard (a part from naming your saves/tracks etc) This is HUGE for me!
I'm really happy with it so far, it feels like a very creative tool again.
I really like Push 2 and i thought with the updates it's getting with Live 10 it would feel much more integral to Live than just a controller but it doesn't. Maschine MK3 almost feels like an instrument.
One negative i have found is that in some modes one of the screens is woefully under utilized