It is perfectly average. One's enjoyment depends on how much they like the main character and the franchise of Detective Conan. My main problem is how the supporting cast's entire purpose seems to prop up Amoru/Rei. It is best consumed in small dosages while waiting for the main manga in my humble opinion. If you enjoy Amoru you will have a fun time.
There is nothing much here, it is extremely episodic, usually focusing on Rei and one supporting character. The story is very main character focused, which is appropriate. I have nothing more to say than it is just fun for those
who like Amoru. The biggest problem is the lack of any short or long term goals, other than enjoyment of Amoru, there is little motivation to keep reading it.
The art style resembles the main manga's to a great extent, it is sharp, and easy to make out. The quality is slightly inferior to the main manga's but not by that much.
Amoru is the main focus of this manga, the supporting cast is somewhat weak. Their purpose sometimes appear to only prop Amoru up. Kazami seems to be the biggest offender, as he just keep realizing that Amoru is so good in everything, but every other character also seems to have that problem. It feels ingenuine to say that the interest in the characters has nothing to do with the main manga.