They say that second parts are no good, it is not really true for this serires.
I do have to say that compared to the original one it lacks deepness on the stories behind each character, their personal life lines are not as strong and lack protagonism.
But I understand it has been adapted to more modern types of series.
I very much recommend watching it, maybe you can expect a modern Kinpachi sensei with a little bit more of humour and less real drama.