Mixed feelings
Night, Dawn, and Day are awesome.
Night revolutionized zombies and the themes of cultural commentary.
Dawn showed an excellent progression in special effects and a continuation of the commentary... though a little muddled by pacing.
Day was excellent on the special effects and a little aggressive on the social commentary. It has a tighter pacing than dawn.
Land employed an excellent mix of practical and CGI effects. The acting, commentary, and story suffer from a director who was getting past his prime.
I love the celebration of Romero's work but the film is hollow. It's on par with reading "Man without a Country" by Kurt Vonnegut. You want to support the creator but the work isn't as good.