My knee-jerk reaction is very positive--I think that matte skin toned shadows are a great thing to use to contour and delicately define all ages and skin tones as a complete look or a base for something dramatic.
Yet, they are mostly lingering in the same pale tones which is unfortunate as I presume the subtlety will likely be lost and the same effect could be achieved through mild blending or lighter application of colors more different in tone. Why there isn't a color bridging the gap between Faint and Crave is beyond me when there are so many colors so close to each other in tone.
I just purchased TheBalm's Meet Matt(e) palette, and I think with that one you are getting colors that perform the same function as these as well as some other colors all in a matte finish for more variety. I suppose the UD set has some shades much more true to skin tones, but with the right brush and application techniques, I'm sure you can get the same subtle effects with TheBalm's palette plus many, many more. Seeing as I just purchased that, I can see no need for this one.
That's my rationalization for not owning both although this does seem quite lovely & you should buy what appeals to you.