I haven’t gone through thorough tests as @aadm, but have picked some late edits and swapped the old couple denoise chroma + denoise luma for the new nlm and got excellent results, after I learned in this thread how to do it right.
In the end, I find the new nlm easier to tweak, and in a more flexible way. For example, removing (or mitigating) dark blotches in very underexposed or high iso images, which, in the old way, I had enormous difficulty to deal with.
All in all, I’m very happy with it so far.