I had low expectations but was surprised how good the first episodes were. I did expect it to drop in quality but I have to admit it's a great TV series right up to its 12th episode. It's not perfect as it's filled with plot holes, but by golly it's entertaining nonetheless.
I suspect one reason why its so good is there are three main story-arcs all compressed into 123 episodes. This means there is almost no fillers and the plot progresses in a brisk manner. You are never bored, although when you are in the last main story-arc you do expect it to be a repeat of the 1st, thus may have less enthusiasm, but they do a reasonable twist at the end.
I suspect one reason why its so good is there are three main story-arcs all compressed into 123 episodes. This means there is almost no fillers and the plot progresses in a brisk manner. You are never bored, although when you are in the last main story-arc you do expect it to be a repeat of the 1st, thus may have less enthusiasm, but they do a reasonable twist at the end.