I've read all of the books. Initially Lou Diamond Phillips struck me as wrong for Henry Standing Bear. After talking to him a few times I've gotten used to his portrayal.
Also spoke several times to Craig Johnson (the author) who seems O.K. with how the series is being handled. Season 4 is the best yet. Hopefully Season 5 will be good too.
I have no problem with the rest of the cast, although I guess Vic is supposed to be a brunette.