[Samba] Any downsides to using MS Services for Unix NIS server?

[Jim Hatfield]

I have both an AD domain and an existing NIS setup, and would like
to merge the accounts. It would seem from reading the help files
that installing Services for Unix on my domain controllers and using
the AD-integrated NIS server would work well. I wouldn't need to use
winbind, and I would have not only consistent but predictable ID
mapping, ie I can ensure that INTERNAL\jhatfield maps to UID 115,
which is what it is on the existing NIS server.

Are there any downsides to doing this - it seems much simpler than
deploying winbind that I feel there must be a catch!