I'm currently reading through the Critique of Pure Reason for the first time and have on hand a book by Martin Heidegger titled, "Phenomenological Interpretations of Kant's Critique of Pure Reason." I was wondering if I should use this as a supplementary work to the Critique, tackle it alone, or use another secondary source for better understanding. So far I'm not having any real trouble with the work, but I assume that I'll probably need some help eventually.
TL;DR: I'm wondering if Heidegger's commentaries on Kant's Critique are a good supplement for a first time reading of the Critique.