"if you ever lost someone close to you, this book will really tug at your heartstrings, but also might become a treasured part of your bookshelf" -ign.com

I think it's true. I can understand this feeling of losing someone and this manga touched my heart, but of course not all the stories did. Some people might find it really boring because many of the stories are similar. Most stories involve people dying, their friends and relatives have similar feelings, and end with Shinjurou performing a small "miracle". He is embalmer. He does his work even though it's hard for him and sometimes it's hard because of the terrible condition of the people's body. But he understands how it's important to see the beautiful/ordinary/(it depends on the situations and the feelings which should be shown) side of someone who was close to you for the last time. Either you can forget about "this" after 5-20 years or it would always be on your mind...
Shinjurou is an ordinary human, but his work can seem awful to other ordinary people. You can see his life through small stories, like how he decided to became the embalmer, how he felt in love with ordinary girl and his failures with her. Through his life you can learn something about death, life, and what is important to you. But you can already know all "these" things.