My initial interest to read this manga sparked from the fact that Platinum End has the same artist and author as Death Note. A series that is arguably one of the most popular and most liked Manga series of all time.
As you can imagine my expectations were quite high when I started reading this one.
I have to get this out here as fast as I can: Platinum End is in no way similar to Death Note!

In the beginning you might find some similarities like how both MCs have some supernatural being as a companion and godlike powers to change the world but the whole atmosphere and story are completely different from another.
Let me get into details now.

Story:
The premise of this manga sounds like a battly royal although it's not really one.
13 angels have the duty to chose one human that then becomes a "god canditate" meaning they become a person among 12 others that will get the chance to become the new god of the world.
Those who are chosen are being bestowed with godly powers.
There are three different powers in total and while some people have all three of those, some only have one because their angel doesn't have a high enough rank.
Just on paper it may sound dull to only have 3 different powers but in execution the author shows that there are many different approaches to make use of their abilites.
In that aspect it's a bit similar to Death Note because the rules of those powers are just as important as the powers themselves.

The story takes a long time to get going though and I only started to enjoy the story to the fulledt when I already read around 15-20 chapters.

Art:
The artstyle of this manga is probably the best thing about it altogether.
It's super detailed with expressions and no character looks like a carbon copy of another. It's ironic but the "blandest" character is probably the main character as he looks pretty much like Light from Death Note.

Character:
Oh boy the characters are probably one of the weakest aspects of the story.
The main character is an extreme pacifist which is not surprising because many shounen MCs fit that bill but in his case it's so extreme that it sometimes just comes off as very annoying. At least there is a reason for him to be this way but still.

Personally I enjoy the side characters way more than him and some of these are really well written to be honest!

The most interesting characters are probably the angels though.
They seem to be loyal to their chosen human but we never know what they really are thinking and what this whole "god choosing" is really all about.
This makes them extremely interesting and mysterious. Not to mention that they're designs are super pleasent to the eye as well!

Enjoyment:
In my opinion this manga is definitely worth reading and is one of the better shounen manga. It's really mature for a Shounen Jump title and tackles some really heavy topics like suicude and illness.
You shold not expect Death Note and you shouldn't expect a Battle Royale ala Kings Game either. It doesn't have as many mind games as Death Note but there are still so many suspenseful moments that want to make you want to read just one more chapter after another!