hummm let me put it this way
It took me about 3 years to read
That is all
I'm not even joking this manga is fun to read and all but it sooooooo long and soooooooo repititive. I read it by never starting over even after taking long breaks from it just starting where I had left off last time when I had gotten bored.
If you want to read essentially 1000 one-shots based around the same character with a very loose unifying theme then this is the manga for you.
Doesn't really do it for me even those the individual cases are rather interesting