I love the coherence so overall it is great. It just looks clean and nice. I wish, however for more apps to have amoled mode with material you cause some of them dont have one. I also think that if you are creating an app that has some characters you shouldnt use material you. When I use app with mdy i feel like it is more of a tool than individual app. Overall it is great, brings coherence and minimalism but if you want to stand out from the crowd dont use it.