Disregard this fellow's feedback, since he clearly has disregarded the platform users and the shared conventions of the platform community.
These elements don't maintain the look and feel of the components at all. They're roughly in the same place, most of the time, and that's about all you can say for them:
https://www.joingrouper.com/assets/new_landing/OnboardingScr...
> Sheesh, even Apple recognized that developers wanted to give their own look to controls by giving them Appearance hooks.
Yes, which you can use without breaking users' expectations, because they still look like they belong. They truly are re-penciling, not a rework of the UI to look like Windows Phone.