We are used to see better movies from Ryûhei Kitamura, so if like me you were a little bit excited to see he made a new one, you are excused if you afterwards you think: well that wasn't really that good. Heck, even if you are really dissapointed (knowing the director or not), it makes sense. What does not make sense is going completely insane and insulting the people involved.
This is not Shakespeare so you can't expect that level of script, dialog or even acting. That does not mean that the people involved are not capable or have not the capacity to gain and reach those heights. Now this is a fun little ride, that could have been more and admittedly gets annoying at times (decisions by the main characters) and the ending is a bit ... well I personally didn't like it that much, but it did get a big laugh from the overall audience, so ... Anyway, this is not for the faint hearted, with all the graphic violence and blood on display. You've been warned