Apart from the cheesy title, this "Zambi" had a pretty interesting premise, with a first episode full of eery atmosphere. But from them on, unfortunately (and particularly from the start of the zombie outbreak - pardon, "zambi" outbreak ^_^;...), the whole thing was completely ruined by one of the lousiest scripts I've ever seen, filled to the brim with inconsistencies, plotholes, horribly poor dialogues, and idiotic scenes (just a few examples - SPOILERS AHEAD, jump to the next paragraph if you want to avoid them! - out of all the teens in the dormitory, apparently only one had her phone with her - like, seriously?!? - but then when the FL awakes inside the coffin, she has a lighter with her - and when another girl is stuck climbing outside a window, she repels a "zambi" using a big spray can - where did she find it? and where had she hidden it until then?!?...as for the dialogues, a memorable example is when one of the girls gets killed - UNMISTAKENLY killed, what with the knife stuck in her heart, the eyes wide open and dead - and in the next scene, a girl asks "Was she really dead?" - Duh! Whaddaya think, girl?!? >_____<)
The acting was quite poor, but with that script, there's nothing they could have done about that - and some of the girls showed how well they can act in another drama, "Eizouken ni wa Te wo Dasu na!" (more on that in my upcoming review of that title).
The music was nothing worth calling hoe about it, either.
Summing it all up: watch it only if you're a Nogizaka fan.